63a 4p Tpn Mccb with Auxiliary Contacts

The 63a 4p tpn mccb with auxiliary contacts is a molded case circuit breaker which has the 63A frame current and 4 poles or 3 poles plus neural. The outside looking is pretty closed between a 4 pole and 3 pol e + N molded case circuit breaker. However, it has not short circuit protection and overload protection in the neutral pole of a 63a TPN MCCB, which means the neutral pole only has the function of isolation.

The rated current of a 63a 4p tpn mccb with auxiliary contacts could be set less than or equal to 63A, such as 10, 16, 20, 25, 32, 40, and 50 amp. However, electrical engineers prefer to set the value of rated current lower than frame current in power system designing.

To bring a more smooth operation experience, Wenzhou Xifa Electric Power Equipment Co., Ltd. also allow the 63a 4p tpn mccb with auxiliary contacts has multiple operation method, such as Rotating handle and motor driving.

Product Parameter:

FAQ:

Q: What is the function of auxiliary contacts in a 63a 4p tpn mccb with auxiliary contacts?

A: 1. status indication: to show the 63a 4p tpn mccb whether in ON OFF or tripped position;

2. Remote monitoring and control: auxiliary contacts can be connected to control the 63a 4p tpn mccb, PLCs, or alarms to provide real time status;

3. Interlocking: auxiliary contacts can be used to interlock schemes to coordinate with other devices.

Q: Besides auxiliary contacts, has other spare parts could equip on a 63a 4p tpn mccb?

A: 1. Shunt Trip (Shunt Release): Allows 63a 4p tpn mccb to be tripped remotely by applying a voltage signal.

2. Undervoltage Trip (UVR / Undervoltage Release): Trips 63a 4p tpn mccb automatically when the supply voltage drops below a set level.

3. Alarm/Signal Contacts: Provides an electrical signal when 63a 4p tpn mccb trips, separate from auxiliary contacts.

4. Mechanical Interlock / Electrical Interlock: Prevents two MCCB from being ON at the same time or enforces a sequence.

Q: what is the benefit to install a 63a 4p mccb rather than a 63a tpn mccb?

A: Rather than a 63a tpn mccb, the advantages of a 63a 4p mccb can be like the below:

1. Neutral Protection: In a 4P 63a molded case circuit breaker, the neutral pole also has overload and short-circuit protection, whereas in 3P+N it usually does not.

Benefit: Provides higher safety for systems with high or unbalanced neutral currents.

2. Better Safety in Fault Conditions: All four poles trip simultaneously under fault conditions.

Benefit: Reduces risk of neutral overcurrent damage and ensures complete disconnection.

3. Suitable for Sensitive Loads: Ideal for data centers, hospitals, or critical industrial applications where neutral protection is important.

Benefit: Protects equipment from damage caused by neutral overloads.

4. Higher System Reliability: Neutral trips along with phase conductors, preventing hidden faults.

Benefit: Reduces maintenance and downtime caused by undetected neutral faults.

5. Compliance with High Safety Standards: Often required by certain standards or local regulations for critical installations.

Benefit: Meets stricter safety and design requirements.