Description

SPAJ140C combined overcurrent and ground fault relay

Product Description

The SPAJ140C is a combined overcurrent and ground fault relay manufactured by ABB that is widely used in power systems for short circuit and ground fault protection. The following is the detailed product description about the SPAJ140C:

I. Product overview

The SPAJ140C is a high-performance relay protection device that combines overcurrent protection and ground fault protection. It is suitable for radiant feeders in directly grounded, resistance-grounded or impedance-grounded power systems, providing selective protection against short circuits and ground faults.

Two, the main characteristics

Rich in features:
A three-phase, low-setting phase overcurrent device with timing or inverse minimum time (IDMT) characteristics.
Three-phase high tuning phase overcurrent device with instantaneous or timing characteristics.
Low-level ground fault devices with timing or inversely fixed minimum time (IDMT) characteristics.
A high level ground fault unit with instantaneous or deterministic time operation.
Built-in circuit breaker failure protection.
Flexible configuration:
The relay consists of two parts: overcurrent element and ground fault element, both of which have highly flexible tripping and signaling devices.
Single-phase, two-phase or three-phase overcurrent protection and directional ground fault protection can be adopted according to the requirements of use.
Easy to operate and monitor:
Local display of measured values, set values, and data recorded at the time of failure.
Settings are read and written through the local display and front panel buttons or through the serial interface and fiber bus of the upper system.
Self-monitoring systems continuously monitor the performance of electronic devices and microprocessors.
Powerful software support:
Powerful software support for relay parameter setting, reading measurements and recording values and events.
Compatibility and Certification:
It is part of ABB’s distribution automation concept and is compatible with the SPACOM product family and ABB distribution automation systems.
CE certification according to the EU Electromagnetic Compatibility (EMC) Directive.
3. Scope of application

SPAJ140C is suitable for user terminal substations with voltage levels of 10kV and below, covering power, construction, local distribution network and other industries. It is suitable for overhead lines, cable lines, inlet and outlet cabinets and other scenarios to provide reliable protection for the power system.

Fourth, installation and wiring

The SPAJ140C acts as a secondary relay and needs to be connected to the current transformer of the protected feeder. Install the device in a dry, ventilated, dust-free, and non-corrosive gas environment. Ensure that the device is well grounded to prevent electric shock and interference.

V. Summary

The SPAJ140C is a feature-rich, flexible, and easy to operate and monitor combined overcurrent and ground fault relay. It is suitable for various power system scenarios and provides reliable protection for the stable operation of power system.

Product parameter

The parameters of SPAJ140C relay can be summarized as follows:

1. Electrical parameters

Rated current:
Rated current of input loop: 5A
Thermal overload capacity: continuous 20A, 500A impulse current carrying capacity in 1 second
Impulse current carrying capacity (half wave value) : 1250A
Input impedance: <20mΩ
Rated frequency: 50HZ
Trip contact:
Terminals: 65,66, 74,75
Rated voltage: 250V AC, DC
Continuous current carrying: 5A
Connect and continue for 0.5 seconds: 30A
Connect and last 3.0 seconds: 15A
Signal contact:
Terminals: 70,71,72 68,69 77,78 80,81
Rated voltage: 250V AC, DC
Continuous current carrying: 5A
Connect and continue for 0.5 seconds: 10A
Connect and last 3.0 seconds: 8A
Insulation test:
Insulation test voltage: according to IEC 255, 52 kV, 50HZ, 1 minute
Impulse test voltage: 0.5 joule according to IEC 255, 55 kV, 1.2/50 microseconds
Insulation impedance: according to IEC 255,5 > 100MΩ at 500 DC
2. Mechanical and environmental parameters

Mechanical characteristics:
Overall dimension: 132mm105mm52mm
Case: IP30 protection grade, corrugated aluminum reinforced case
Mounting method: 35mm DIN rail mounting
Net weight: 800g
Working environment:
Operating temperature: -10-70℃ (wide temperature can be selected to -40~+85℃)
Relative humidity: ≤90% (no condensation)
Storage temperature: -40 ~ 80℃
Third, testing and certification

The test certification conforms to IEC61000-4 series standards, including ESD, RS, EFT, Surge, CS and MS tests.
Iv. Technical description

The SPAJ140C offers a variety of protection features, including overcurrent protection and ground fault protection, as well as flexible tripping and signaling devices.
It supports single-phase, two-phase or three-phase overcurrent protection and directional ground fault protection.
The relay has built-in circuit breaker fault protection and provides local display and powerful software support.

Application field

Industrial Automation: In industrial automation applications that require continuous monitoring and protection of critical equipment, the 125840-02 module provides the necessary power input capabilities.
Energy industry: This module plays an important role in the energy industry such as oil, gas, electricity, especially in applications involving large rotating machinery such as turbines, generators, etc.
Other fields: In chemical, steel, manufacturing and other fields, where high-precision and high-reliability vibration monitoring and protection systems are needed, the 3500/15 125840-02 module may also be used.

Please contact Sunny sales@xiongbagk.cn for the best price.

➱ sales manager: Sunny
➱ email mailto: sales@xiongbagk.cn
➱ Skype/WeChat: 18059884797
➱ phone/Whatsapp: + 86 18059884797
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