GW22-252 Outdoor AC Disconnector
Application: In 252kV power system, to separating the circuits under off-load status, set up air electrical clearning between the tested electrical apparatuses and electrified circuit.
Standards: IEC 62271-102
Parameters: Rated voltage: 252kV.
Rated current: 3150, 4000A.
Rated short time withstand current, 3s: 50kA.
Features: 1.With the min. phase distance and vertical length compared with similar products.
2.With high mechanical intensity and light by adoption of aluminum alloy at the conductive part.
3.Reliable operation.
4.Influence of the environment reduced with the operation mechanism and balancing spring sealed in tubes.
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protection of circuits against short-circuit currents,protection of circuits against overload currents,switch,isolation.
1.2 Selection
Technical data of the network at the point considered:the earthing systems (TNS, TNC),short-circuit current at the circuit-breaker installation point, which must always be less than the breaking capacity of this device,network normal voltage.
1.3 Approvals and certificates
Detailed information, please refer to Certificates Table on the last page.
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Electromagnetic release type: B, C, D;
Number of poles: 1P, 2P, 3P, 4P;
Mechanical life: 20000 cycles;
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1.1 Function
Control electric circuits.
Protect people against indirect contacts and additional protection against direct contacts.
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1.2 Selection
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AC class
Tripping is ensured for slowly increasing sinusoidal AC residual currents.
A class
Tripping is ensured for sinusoidal AC residual currents and for pulsed DC residual currents, whether applied suddenly or increasing slowly.
S, G/SI class
Tripping is ensured not only for sinusoidal AC residual currents but also for pulsed DC residual currents whether applied suddenly or increasing slowly. S, G/SI type with filters against spurious tripping caused by harmonics and transient surges.
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1.1 Function
protection of circuits against short-circuit currents,protection of circuits against overload currents,switch,isolation.
1.2 Selection
Technical data of the network at the point considered:the earthing systems (TNS, TNC),short-circuit current at the circuit-breaker installation point, which must always be less than the breaking capacity of this device,network normal voltage.
Tripping curves:
B curve (3-5In)
protection for people and big length cables in TN and IT
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C curve (5-10In)
protection for resistive and inductive loads with low inrushcurrent.
D curve(10-20In)
protection for circuits which supply loads with high inrush current at the circuit closing
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Electromagnetic release type: B, C, D;
Number of poles: 1P, 1P+N, 2P, 3P, 3P+N, 4P;
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1.1 Function
Control electric circuits.
Protect people against indirect contacts and additional protection against direct contacts.
Protect installations against fire hazard due to insulation faults.
Residual current circuit breakers are used in housing, tertiary sector and industry.
1.2 Selection
Detectable wave form
Type B
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Tripping sensitivity
30mA - additional protection against direct contact.
100mA - co-ordinated with the earth system according to the formula IΔn＜50/R, to provide protection against indirect contacts;
300mA - protection against indirect contacts, as well as fire hazard.
Tripping time
Instantaneous
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1.3 Approvals and certificates CE, KEMA
1.4 Add-on devices
AX-5 auxiliary contacts
TC-1 terminal cover
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