SIEMENS 7PA2632-1AA00-1 Protection Relay

SIEMENS 7PA2632-1AA00-1 Protection Relay

The Siemens 7PA2632-1AA00-1 is a high-speed tripping relay (auxiliary protection relay) used in electrical protection and substation control systems.

Product Information

• Brand: Siemens
• Part Number: 7PA2632-1AA00-1
• Series: 7PA26 Monostable Relay family
• Type: Tripping / Auxiliary Protection Relay
• Function: Fast switching (trip signal transfer) in protection circuits
• Contacts: 8 changeover contacts
• Coil voltage: 110–125 V DC
• Operating time: ~10 ms fast tripping response
• Mounting: With socket base (7XP9010-3) for panel installation

What it actually is

This is not a PLC or electronic module.

It is an electromechanical protection relay, used to:

• Receive trip signals from protection relays (like REF/7SR series)
• Quickly switch multiple output contacts simultaneously
• Activate circuit breakers or alarm circuits
• Provide signal amplification (low control → multiple outputs)

System Role (Simple)

Protection relay (IED like ABB REF615 / Siemens 7SR)
→ sends TRIP signal (DC 110V)
→ 7PA2632 tripping relay
→ multiple contacts switch in parallel
→ circuit breaker opens / alarms activate

So it acts like a “signal multiplier + fast switching interface”.

Key Features

• Very fast switching (~10 ms response)
• 8 independent changeover contacts
• Designed for protection and tripping circuits
• Works with substation DC control systems
• High reliability for fault conditions
• Socket-mounted modular design

Typical Applications

• High-voltage substations
• Circuit breaker tripping circuits
• Protection relay output expansion
• Alarm and interlocking systems
• Power transmission and distribution systems

Important Notes

• Not a PLC ❌
• Not a digital I/O module ❌
• Not a communication device ❌
• It is a high-speed auxiliary tripping relay ✔
• Works together with protection relays (REF / SIPROTEC / etc.)

Precautions

• Coil requires stable DC control supply (110/125V DC)
• Must be used in protection-grade circuits
• Incorrect wiring may cause false tripping or failure to trip
• Not suitable for general industrial automation logic
• Installation must follow substation protection design rules