SIEMENS 3AH3 series vacuum circuit breaker

12NO+12NC extended contacts, suitable for complex interlocking multi loop control

Connection interface 24 pole terminal block regular wiring (no plug) fixed installation

64 pole plug for quick insertion and removal, some interfaces can be customized with drawer style switch devices

Additional function Z A30 anti condensation heating (230V AC/50W) for high humidity environment

Z W70 warranty extended to 24 months for critical equipment

Z A70 3AH37 (5000A+) horizontal installation suitable for horizontal installation scenarios

3. Special configuration of generator circuit breaker (IEC/IEEE 62271-37-013)

Additional testing requirements:

Generator side fault: withstand high DC component (130%), no current zero crossing point;

System side fault: higher TRV rise rate, higher test voltage;

Split phase design:

Single pole independent packaging, suitable for 12500A/100kA scenarios, supports parallel operation;

Technical parameter example (17.5kV): Short circuit breaking current 50-90kA, DC component 45-130%, asymmetric breaking current 52-146kA.

Application and maintenance

1. Typical application scenarios

Industrial power distribution: Factory medium voltage power distribution system (high load current 6300A);

Generator protection: 3AH37/38 series (compatible with 17.5/24kV generators, capable of withstanding high DC components);

Special industries: refineries, extruders (harsh environments, compatible with 3C2 grade);

**Retrofit project * *: Replace compressed air generator circuit breakers (6kV, 86.5kA, 3500A).

2. Maintenance and Accessories

Maintenance free range: Within 10000 operating cycles, no lubrication or adjustment is required, only the insulation components need to be cleaned;

Key accessories:

Accessory Name Order Number Usage

Operating handle 3AX15 30-4B manual energy storage

Replacement of vacuum arc extinguishing chamber 3AY17 15-2J 3AH3228-2/6/7 model

Auxiliary switch cable bundle 3AX11 34-2D 64 pole plug wiring (10 wires)

Lubricating grease 3AX11 33-3H Special scenario bearing lubrication (180g Kl ü ber)

Warranty and documentation:

Standard warranty: 12 months, optional Z W70 (24 months), Z W71 (36 months);

Documents: Operating instructions (German/English/French/Spanish), dimension drawings (such as A7E32500008).

Technical data and operational characteristics

1. Operation time (under rated secondary voltage)

Operation type, time parameter value

Closing time from command to contact closure ＜ 75ms

Opening time: 1 shunt release<60ms

2/3 release devices ＜ 55ms

The duration of the arc after the ignition time is opened is less than 15ms

The disconnection time of one shunt release (disconnection+arcing) is less than 75ms

2/3 release devices ＜ 70ms

Energy storage time: Electric energy storage (full capacity) ＜ 15s

2. Release power consumption (reference value)

Release type DC power consumption (W) AC power consumption (VA) Operating range

Closing soleoid 140 140 85-110% rated voltage (DC/AC)

1st shunt release 140 140 70-110% rated voltage (DC), 85-110% (AC)

2nd shunt release 60 60 70-110% rated voltage (DC), 85-110% (AC)

Undervoltage release 20 20 35-0% rated voltage (DC/AC)

Current Transformer Operating Release -10 90-110% Rated Current (AC)