- Info
GCP-21
Genset control for Single/Parallel Operation
The GCP-20 Series genset control is designed to provide total control for stand-alone and multiple unit applications in isolated or mains parallel operation. Load management features include automatic base/peak shaving, import/export control and emergency power/back up power generation.
There are three GCP-20 Series Packages available for various genset applications. The GCP-20 is designed for stand-by gensets. Open or closed transition power transfers including logic for two circuit breakers. The GCP-21 is designed for continuous parallel operation and has control logic for one circuit breaker. The GCP-22 has control logic for two circuit breakers that enable automatic power transfers like open transition, closed transition and softloading.
View GCP-21 application
Common Product Features:
- True RMS voltage (generator/busbar/mains)
- True RMS current (generator/mains)
- Start/stop logic for Diesel/gas engines
- Engine pre-glow or purge control
- Battery voltage monitoring
- Speed control with overspeed monitoring
- kWh/operation hours/start/maintenance counter
- Configurable trip/control set points
- Configurable delays for each protection
- Real power/power factor (cosphi) control
- Mains parallel operation
- Mains import/export power control
- Reduced power monitoring
- Load dependent start/stop
- Load/var sharing (up to 8 units)
- Speed input (magnetic/switching pickup, MPU)
- 14 configurable discrete alarm inputs
- 4 configurable/programmable relays
- Two-line LC display
- Push-buttons for direct control
- Multi-level password protection
- Speed/frequency/voltage controller
- Isolated operation
- CAN bus communication for remote control/monitoring/configuration
- CE marked
- UL/cUL listed
Protection Functions:
- Mains/generator over/undervoltage (ANSI# 59/27)
- Mains/generator over/underfrequency (ANSI# 81O/U)
- Mains phase/vector shift (ANSI# 78)
- Generator overload (ANSI# 32)
- Generator reverse power (ANSI# 32R)
- Generator unbalanced load (ANSI# 46)
- Generator time-overcurrent (TOC) (ANSI# 50)
Package LS Features:
- Discrete raise lower for:
- Speed (n)
- Frequency (f)
- Voltage (V)
- Real power (P)
- Reactive power (Q)
Package LSB Features:
- Analog raise lower for:
- Speed (n)
- Frequency (f)
- Voltage (V)
- Real power (P)
- Reactive power (Q)
Package LSR Features:
- Discrete raise lower for:
- Voltage (V)
- Reactive power (Q)
- Analog raise lower for:
- Speed (n)
- Frequency (f)
- Real power (P)
- 4 configurable analog inputs
Package LSX Features:
- Analog raise lower for:
- Speed (n)
- Frequency (f)
- Voltage (V)
- Real power (P)
- Reactive power (Q)
- Real power set point value via 0/4 to 20 mA
- 3 configurable analog inputs
- 2 configurable analog outputs
Certifications / registrations: UL/cUL, CE

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