3VT4 Molded Case Circuit Breakers up to 1000 A

Transcription

1 VT4 Molded Case Circuit Breakers up to 00 A Catalog Technical nformation VT4 Molded Case Circuit Breakers up to 00 A General data / - Overview Circuit breakers Switch disconnectors / - Selection and ordering data / - Accessories / - Technical specifiations VT4 Molded Case Circuit Breakers up to 00 A / Circuit breakers Switch disconnectors /6 - Technical specifications Siemens V 6 008

2 General data Overview / Siemens V 6 008

3 Circuit breakers, Switch disconnectors Selection and ordering data The switching unit consits of: - VT9 0-8CE0 phase barriers - connecting sets for front connection - busbars connection The switching unit must be fitted with: - overcurrent release ETU DP, MP and UP (circuit breaker) or - VT9 4-6DT00 switch disconnector unit - VT9 0-4WA40 withdrawable device The withdrawable device must be fitted with: - x VT9 0-4EF0 connection set (front connection) or - VT9 0-4RD0 (rear connection) We recommend fitting the switching unit with: - VT9 0-4SA40 mounting bolts set (4 x M8 x 60) Switching units Rated current n Switching capacity cu DT Order no. PS* Weight per PU approx. A ka kg Fixed-mounted version, -pole 00 6 B VT4 7-AA0-0AA0 unit.000 Withdrawable design, -pole 00 6 B VT4 7-AA8-0AA0 unit.000 Withdrawable device Withdrawbale device B VT9 0-4WA40 unit 00 Accessories ETU trip unit Rated current n Set current of the inversetime delayed overload trip units r DT Order no. PS* Weight per PU approx. A A kg System protection, ETU DP, function For protecting lines and transformers... B VT9 4-6AC00 unit B VT9 46-6AC00 unit B VT AC00 unit B VT9 4-6AC00 unit 6 Motor and generator protection, ETU MP, funktion Direct protection for motors and generators Suitable also for protecting lines and transformers... B VT9 4-6AP00 unit B VT9 46-6AP00 unit B VT AP00 unit B VT9 4-6AP00 unit 0.90 Universal protection, ETU UP, S function For protecting complicated loads or those not specified in advance... B VT9 4-6AD00 unit B VT9 46-6AD00 unit B VT AD00 unit B VT9 4-6AD00 unit 0.0 * You can order this quantity or a multiple thereof. Siemens V /

4 Circuit breakers, Switch disconnectors Rated current n Set current of the inversetime delayed overload trip units / r DT Order no. PS* Weight per PU approx. A A kg Switch-disconnector unit 00 Switch-disconnector unit B VT9 4-6DT00 unit Signalling unit for overcurrent releases ETU, P and UP B VT9 0-6AE00 unit /4 Siemens V * You can order this quantity or a multiple thereof.

5 Circuit breakers, Switch disconnectors Technical specifications Specifications VT4 circuit breakers Switch disconnectors Type Standards EN , EC 947- EN , EC 947- Approval marks Number of poles Rated current n A, 60, 800, Rated normal current u A 00 Rated operational current e A Rated operational voltage U e V AC max. 690 AC max. 690 DC max. 440 Rated frequency f n Hz /60 Rated impulse withstand voltage U imp kv 8 Rated insulation voltage U i V 690 Utilization category (selectivity) AC 690 V A, B -- Utilization category (switching mode) available, -- unavailable AC 690 V DC 440 V AC- B DC- B Rated short-time withstand current U e =AC 690 V cw /t ka/ s ka/ s Rated ultimate short-circuit breaking capacity (rms value) ) cu /U e AC 8 ka/0v AC 6 ka/4v AC 4 ka/0v AC 0 ka/690v Off-time at cu 0 ms -- Rated short-circuit service breaking capacity (rms value) cs /U e AC 4 ka/0v AC 6 ka/4v AC 0 ka/0v AC 0 ka/690v Rated short-circuit making capacity 40 ka/ac 4 V 0 ka/ac 4 V (peak value) cm /U e 0 ka/dc 440 V osses per pole at n = A W 0 Mechanical endurance cycles 000 Electrical endurance (U e = AC 4 V ) cycles 4000 Switching frequency cycles /hr Operating force N 0 Front-side device protection 0 P40 Terminal protection P0 Operating conditions Reference ambient temperature C 40 Ambient temperature range Working environment Degree of pollution Max. elevation m 000 dry and tropical climate Seismic resistance Hz g (8... ) Design modifications Front/rear connection / Plug-in design -- Withdrawable design Accessories Switches-auxiliary/relative/signal/early Shunt trip/with signal switch Undervoltage release/with early switch with signal switch Manual front operating mechanism/lateral operating mechanism right/left Mechanical interlocking to the manual operating mechanism, by Bowden wire Motorized operating mechanism/with operations counter ocking-type lever Bolt sealing inset/additional cover for overcurrent release / /--/-- /-- / / / / ) n case circuit breaker connection is reversed (input terminals, 4, 6 output terminals,, ), cu does not change. Siemens V /

6 Technical specifications The electronic overcurrent release consists of a separate and interchangeable unit, which is supplied with the VT4 7-AA..- 0AA0 switching unit. By exchanging the overcurrent release, the range of the circuit breaker s rated current can be easily changed. Releases for the VT4 7-AA0-0AA0 switching unit are produced in four current ranges n =, 60, 800 and 00 A. The releases, including their adjustment, cover rated currents ranging from to 00 A. Depending on the needs for adjusting the release s tripping characteristics to the protected device and to the variability of the characteristics with regard to selectivity, the following release devices are available: ETU DP is a zone of high overcurrents and includes protection against ultimate short-circuit currents. For ETU MP releases, the time delay can be set at 0 or ms. t r i NSO0_007 They have one type of characteristics with adjustable r and rm. ETU MP t r tr i NSO0_0074 They have more kinds of characteristics with adjustable r, t r and rm. ETU UP They have universal characteristics, with the greatest variability in adjustment: r, t r, sd, t sd and i. ETU DP, MP and UP Proper functioning of releases does not depend on the form of current in the main circuit. The function of the release is supported by a microprocessor, which processes a sampled signal of the power circuit and recalculates it to obtain an rms value. Therefore, digital releases are suitable for protecting circuits where the sinusoidal current is distorted by high harmonics (e.g. circuits with controlled rectifiers, power factor compensators, pulse loading, and the like). All the releases protect a circuit against short-circuiting and overloading. Setting of selective cascading of circuit breakers is especially enabled by the ETU UP release. Tripping characteristics of the releases are independent of the ambient temperature. The release is affixed to the switching unit by two bolts. The translucent cover over the adjustment controls can be sealed. Adjustment of the tripping characteristics for ETU DP and MP releases The tripping characteristics of the overcurrent releases are defined by standard EN The characteristics are adjusted in two zones using latched switches on the overcurrent release unit: is a zone of low overcurrents and includes the area of thermal protection. /6 Siemens V 6 008

7 . Dependent release (thermal) The dependent release ETU DP is adjusted using one r switch. The r switch is used to adjust the circuit breaker s rated current. The characteristic is moved on the current axis. By means of its internal circuitry, the release is set to one type of characteristic. The dependent release ETU MP is adjusted using two switches, r and t r. The first ( r ) switch is used to adjust the circuit breaker s rated current. The characteristics are moved on the current axis. By turning the other switch (t r ), the time after which the circuit breaker will trip while passing through 7. r. The tripping characteristic thus moves on the time axis. Using the tr switch, it is possible to set a total of 8 characteristics. Four characteristics are available for motors protection. Breaking times correspond with the release class A,, 0, 0. By changing t r, it is possible to select the characteristics according to the required motor starting (light, medium, heavy or very heavy starting). For protecting transformers and lines, 4 characteristics can be set. t is not possible to turn the device back on right after the dependent release has been actuated and circuit breaker tripped. The release must be allowed to cool off, because it has a thermal memory. The memory can be disabled by turning the restart switch from the normal T t position to the T 0 position. The dependent release remains active, and only its thermal memory is inactivated. The thermal memory should be switched off only in justified cases, and with the knowledge that the temperature could rise in the protected device with repeated tripping.. ndependent instantaneous release (short-circuit release) The independent instantaneous release in designs ETU DP and ETU MP is adjusted using one switch, i. The i switch is used for setting up the short-circuit current that, upon its being reached or exceeded, causes instantaneous tripping of the circuit breaker. Regulation of the short-circuit release takes in settings for the characteristic appropriate for protecting lines and motors. The wave form of the tripping characteristic is adjusted using latched switches on the release s front panel according to the needs of the protected device. A visual demonstration on setting the tripping characteristics can be found in the SMARS design. Tripping characteristics of ETU DP and MP releases with load The tripping characteristics from the cold state indicate the tripping times during which it is assumed that, up to the moment when an overcurrent develops, no current is flowing through the circuit breaker. The tripping characteristics tripped from warm state, indicate the tripping times during which it k [-] NSO0_ r [%] is assumed that, before the moment when an overcurrent develops, current is flowing through the circuit breaker. Characteristics of electronic releases are independent of the ambient temperature and are plotted in a cold state. Digital releases enable simulation of a release in warm state. The tripping times become shorter in a steady state, as shown in the following graph. The steady state is a period during which the characteristics do not change. f the circuit breaker is loaded with a reduced current for at least 0 minutes, the tripping times will be cut by a half. f the load is less than 70% of r, the tripping time does not become shorter. T Siemens V /7

8 ETU DP and MP tripping times shortening with load T - When tripping from the release s warm state, the tripping time of the characteristic is cut short during the standstill time t u by coefficient k. Thermal standstill time of the characteristics For all kinds of characteristics t r, the thermal standstill time for ETU DP and MP releases is t u 0 min. During this time, the short-circuit tripping time t v is cut short from the cold-state characteristic by the coefficient k. The real tripping time is t s = k. t v Example The shortening constant can be read from the diagram. With steady current 8% of r the real tripping time will be shortened to: t s = t v k [ ] time shortening coefficient r [A] adjusted rated current of the overcurrent release t v [s] tripping time of the release derived from the characteristic t s [s] real tripping time of the release tripped from warm state t u [s] standstill period for particular characteristics are set by the manufacturer r = min Restart = T (t) rm = min, 0 ms t r = TV, min /8 Siemens V 6 008

9 Adjustment of tripping characteristics, Trip unit ETU UP t NSO0_0046 r S t r sd t OFF t ON t sd The tripping characteristics of overcurrent releases are defined by standard EN The characteristics are adjusted in three zones using latched switches on the overcurrent release unit: - is a zone of low overcurrents and includes the area of thermal protection. S - is a zone of medium overcurrents and includes long-distance short-circuit protection for lines. ntentional delay in tripping of these low short-circuit currents can be used to achieve selectivity of protective devices. This type of delay can be set only in self-contained releases (full version). - is a zone of high overcurrents and includes protection against ultimate short-circuiting without time delay. t - Characteristic setting in the ON position represents a constant value of energy passed through. f fuses are used as protective elements for outgoing branch feeders, it is possible to adjust the selective part of the characteristics to better suit the shape of the fuse characteristics.. Dependent release (thermal) i The dependent release ETU UP is adjusted using two switches, r and t r. Using the first switch, r, the circuit breaker s rated current is adjusted. The characteristics are moved on the current axis. Turning the second switch, t r, adjusts the time after which the circuit breaker will trip while passing through 7. r. The tripping characteristics thus move on the time axis. Using the t r switch, a total of 8 characteristics can be set. Breaking times correspond with the release class A,, 0, 0. t is not possible to turn the device back on right after the dependent release has been actuated and circuit breaker tripped. The release must be allowed to cool off, because it has a thermal memory. The memory can be disabled by turning the restart switch from the normal T t position to the T 0 position. The dependent release remains active, and only its thermal memory is inactivated. The thermal memory should be switched off only in justified cases, and with the knowledge that there could be rising temperature in the protected device with repeated tripping.. Delayed independent releases S The delayed independent release has the function of a delayed short-circuit release. t is used to set up a selective cascade of circuit breakers. t is set up using specifications sd and t sd. sd is an n-multiple of current r ( sd = n r ). t is a shortcircuit current that, within the span of sd to rm, will trip the circuit breaker with delay t sd, where t sd is a delay set up for switching off the release. The delayed independent release actuates the circuit breaker if the current in the circuit reaches at least the preset n-multiple and lasts at least the preset delay time t sd. The independent release can be disabled by setting the parameter n ( sd = n r ) into the position. Parameter t sd can be set to values with respect to the energy that passed through l t (switch position l t on). The preset time values are then applicable for currents higher than x current r. Tripping times of k-multiples of r for k < are defined as follows: t = t v k. ndependent instantaneous release The independent instantaneous release has the function of a short-circuit release. t is set up only on parameter rm. rm is a short-circuit current that, upon its being reached or exceeded, causes the circuit breaker to switch off instantaneously. t is set up directly in ka on the release. The wave form of the tripping characteristic is adjusted using latched switches on the release s front panel according to the needs of the protected device. A visual demonstration on setting the tripping characteristic can be found in the SMARS design. Siemens V /9

10 Tripping characteristics for ETU UP release with load The tripping characteristics from the cold state indicate the tripping times during which it is assumed that, up to the moment when an overcurrent develops, no current is flowing through the circuit breaker. The tripping characteristics tripped from warm state indicate the tripping times during which it is assumed that, before the moment when an overcurrent develops, current is flowing through the circuit breaker. Characteristics of electronic releases are independent of the ambient temperature and are plotted in a cold state. Digital releases enable simulation of a release in warm state. The tripping times become shorter in a steady state, as shown in the following diagram. The steady state is a period during which the characteristics do not change. f the circuit breaker is loaded with a reduced current for at least 0 minutes, the tripping times will be cut by half. f the load is less than 70% of r, the tripping time does not become shorter. k [-] NSO0_007 Example The shortening constant can be read from the diagram. With steady current 8% of r, the real tripping time will be shortened to: t s = t v k [ ] time shortening coefficient r [A] adjusted rated current release t v [s] tripping time of the release derived from the characteristics t s [s] real tripping time of the release tripped from warm state t u [s] standstill period for particular characteristics are set by the manufacturer r = min Restart = T (t) rm = min t r = min t v = min, t - ON sd = min Manufacturer r = min T Restart = T (t) rm = min, 0 ms t r = TV, t (t), min sd = 0 ms, min = 0. r r [%] T - When tripping from the release s warm state, the tripping time of the characteristics are cut short during the standstill time t u by coefficient k. Thermal standstill time of the characteristics For all kinds of characteristics t r the thermal standstill period for ETU UP releases is t u 0 min. During this time, the short-circuit tripping time t v is cut short from the cold-state characteristics by the coefficient k. The real tripping time is ts = k.t v / Siemens V 6 008

11 ETU DP-Distribution Protecting lines and transformers The VT AC00 release is intended only for the VT4 7- AA..-0AA0 switching unit. Operation of the release is controlled by a microprocessor. The release is fitted with a thermal memory that can be disabled by turning the switch on the front panel from position T (t) to position T (0). After having disabled the thermal memory, the thermal release remains active. A practical advantage of the release are special tripping characteristics that provide for optimized use of transformers up to. n. Another advantage of this release is the simple adjustment of the tripping characteristics. Set-up includes only the rated current in a range of 0.4 to of n and the short-circuit tripping level. The reaching of 80% and % of r is indicated by ED diodes on the front panel denoted as > 80% and > % of r. On the lower part of the release cover are four photocells for communicating with the VT9 0-6AE00 signalling unit are mounted. Tripping characteristics t [s] min. n=60a n = A n=00a n = 60 A n=a n = 800 A n=600a n = 00 A n = A n = 60 A n = 800 A n = 00 A r max NSO0_ x n r i Specifications for adjustable releases Order No. Rated current n A Overload protection r Restart A, , 60 7, , 0 T (0) VT9 4-6AC00, 4 T (t)., 60 7, ,, 60 7, 90. 0, 4, 60 T (0) VT9 46-6AC , 4 T (t) 4 4, , 8 7, 60, 4 60, , 4 480, 0 T (0) VT AC00 800, 7 T (0) 4 6, , , , 4. 4, 480 0, 7, 6 T (0) VT9 4-6AC , 68 T (0) 7 70, , , 00 4 nstantaneous short circuit protection Siemens V /

12 ETU MP-Motors Direct protection of motors and generators Possibility for protecting lines and transformers The VT AP00 release is intended only for the VT4 7- AA..-0AA0 switching unit. The operation of the release is controlled by a microprocessor. The release is equipped with a thermal memory that can be disabled by turning a switch on the front panel from position T (t) to position T (0). After having disabled the thermal memory, the thermal release remains active. A practical advantage of the release are specially designed tripping characteristics that provide for optimal exploitation of transformers up to. n. t is possible to set a total of 8 characteristics on the release. From these, in mode M there are 4 characteristics for motor protection and another 4 characteristics in mode T V for protecting transformers and lines. The shape of each characteristic can be changed using a selector switch. When one or two phases fail, in the M-characteristic mode, the switch will open with a 4 s delay (so called undercurrent release). Another parameter for adjusting the release is the rated current, which is adjusted in a range of 0.4 to of n and the shortcircuit tripping level, for which it is possible to set the delay at 0 or ms. The reaching of 80% and % of r is indicated by ED diodes on the front panel denoted as > 80% of r and > % of r. On the lower part of the release cover four photocells are mounted for communicating with the VT9 0-6AE00 signalling unit. Specifications for adjustable releases Order No. Rate d current n Overload protection r t r (7. x r) Restar t nstantaneous short circuit protection A A S ka ms 0., 7 (TV ). 44, 60 (TV ) T (0) 0 7, 80 (TV ) VT9 4-6AP00 00, 0 0 (TV 0)., 4 (TV ) 4, 60 8 (TV 8) T (t). 7, 90 (TV ). 0, (TV ) 0., 60 (TV ). 7, 90 (TV ) T (0) 0, (TV ) 6 VT9 46-6AP , 60 0 (TV 0) 400, 4 (TV ) 8 4, (TV 8) T (t) 4 0, (TV ) 7, 60 (TV ) , 4 (TV ). 4, 480 (TV ) T (0) , (TV ) 6 9 VT AP , 6 0 (TV 0) 60, 68 (TV ) 9 7, (TV 8) T (t) 4 800, 866 (TV ) 909, 00 (TV ) , 4 (TV ) 4, 480 (TV ) T (0) 0 0, (TV ) 9 VT9 4-6AP , 6 0 (TV 0) 4 60, 68 (TV ) 7, (TV 8) 7 7 T (t) 800, 866 (TV ) 909, 00 (TV ). 9 / Siemens V 6 008

13 Tripping characteristic ETU MP t [s] min. r max. r t r 0 ms ms i NSO0_0078 TV t [s] min. r max. r t r 0 ms ms i NSO0_0079 M n=60a n = A n=00a n = 60 A n=a n = 800 A n=600a n = 00 A n = A n = 60 A n = 800 A n = 00 A t r x n n=60a n = A n=00a n = 60 A n=a n = 800 A n=600a n = 00 A n = A n = 60 A n = 800 A n = 00 A t r x n Siemens V /

14 Overcurrent trip unit-etu UP For protecting complicated loads or those not specified in advance The VT AD00 release is intended only for the VT4 7- AA..-0AA0 switching unit. The release is equipped with a thermal memory that can be disabled by turning the restart switch on the front panel from the position T (t) to the position T (0). After the thermal memory has been disabled, the thermal release remains active. A practical advantage of the release is its maximum flexibility for adjusting the tripping characteristics. With its possibility for setting t = constant and t = constant, it is optimal from the selectivity viewpoint for its interaction with fusing devices. The operational state 70% of r is signalled by an ED indicator that flashes green in a. s interval. As the load grows, the blinking frequency of the diode increases. n case of a load larger than % of r this ED will turn red and just before tripping will begin to blink red. On the lower part of the release cover, four photocells are mounted for communicating with the VT9 0-6AE00 signalling unit. Specifications for adjustable releases Order No. Rated current n Short delayed short circuit protection sd =(n x r ) Overload t r (7. x r ) n t sd t Restart nstantaneous protection r short circuit protection A A S A ms ka, 7 0., , 60 00, 00 on T (0) 7, , 600. VT9 4-6AD00 00, , 00, 4 8, 0., , 00 off T (t) 7, , , 800, 00, 60 0., 0 7, 90 00, 00 on T (0). 0, 400, 600 VT9 46-6AD , , , 4 8, 0 4 4, , 00 off T (t) 6 0, 0 400, , , 00, 4 0., 0 60, , 00 on T (0). 4, 4 400, 600 VT AD , , 00, 7 8, 0 4 6, , 00 off T (t) 6 68, , , , , 4 0., 0. 4, , 00 on T (0) 0, 400, 600 VT9 4-6AD , , 00 60, 68 8, , , 00 off T (t) 9 800, , , , 00 4 /4 Siemens V 6 008

15 Tripping characteristics ETU UP t [s] n = A n = 60 A n = 800 A n = 00 A n = A n = 60 A n = 800 A min. n = 00 A S t v [ms] ( t = OFF) r max. i = ( ) x r min t r [s] r t r sd i = ( ) x r max NSO0_ x n t v i t [s] n = A n = 60 A n = 800 A n = 00 A n = A n = 60 A n = 800 A min. n = 00 A S r t v [ms] ( t = ON) max. sd = ( ) x r min NSO0_008 r t r sd t v i sd = ( ) x r max t r [s] x n Siemens V /

16 Tripping characteristics ETU UP t [s] n = A n = 60 A n = 800 A n = 00 A n = A n = 60 A n = 800 A n = 00 A min. S r t v [ms] ( t = OFF) max. sd = ( ) x r min NSO0_008 r t r sd t v i sd = ( ) x r max t r[s] 0 x n t [s] n = A n = 60 A n = 800 A n = 00 A n = A n = 60 A n = 800 A min. n = 00 A S r t v [ms] ( t = ON) max. sd = ( ) x r min NSO0_008 r t r sd t v i sd = ( ) x r max t r [s] 0 x n 7 /6 Siemens V 6 008

17 VT Molded Case Circuit Breakers up to 600 A 6 Catalog Technical nformation VT Molded Case Circuit Breakers up to 600 A General data 6/ - Overview Standard circuit breakers, releases 6/ - Selection and ordering data 6/ - Accessories Accessories and Components Auxiliary switches and shunt trip units 6/4 - Selection and ordering data Manual/motorized operating mechanisms 6/ - Overview 6/ - Selection and ordering data Mounting accessories 6/6 - Selection and ordering data Further accessories 6/7 - Selection and ordering data VT Molded Case Circuit Breakers up to 600 A Standard circuit breakers, trip units 6/8 - Technical specifications Circuit breakers, switch disconnectors 6/9 - Schematics 6/ - Functions 6/ - Design 6/ - Dimensional drawings Accessories and Components Withdrawable version 6/ - Technical specifications 6/ - Technical specifications Signalling units 6/ - Technical data Auxiliary switches 6/6 - Technical data Shunt releases 6/7 - Technical data Undervoltage releases 6/8 - Technical data Rotary operating mechanism 6/9 - Technical data Mechanical interlocks and mechanical interlocks for parallel switching 6/0 - Technical data Motorized operating mechanism 6/ - Technical data Siemens V 6 008