SPM-D21

The SPM-D21 (ASG 421) is a microprocessor-based synchronizer designed for use on three phase AC generators equipped with Woodward or other compatible speed controls and automatic voltage regulators. The SPM-D21 provides automatic frequency, phase and voltage matching using either analog or discrete output signals.
It combines synchronizing for a generator circuit breaker (GCB) and a mains circuit breaker (MCB), load and power factor control, and generator and mains protection.

View SPM-D21 one/two CB application
View SPM-D21 multiple genset application

Common Features:

• GCB and MCB synchronization
• Phase match or slip frequency synchronization with voltage matching
• 2-phase sensing of generator and busbar
• Synchronization time monitoring
• Real power control
• True RMS power calculation
• Generator real power set point by parameter or via 0/4 to 20 mA
• Soft unloading
• Power factor control
• Power factor set point by parameter
• Power limit value with relay output
• Discrete raise/lower for speed/load
• Discrete raise/lower for voltage/power factor 
• Two-line Liquid Crystal display
• Operation and alarm indication
• Control activity and breaker state indication
• Synchroscope
• Generator/busbar value display
• English/German display language
• PC and front panel configurable

Protection Functions:

• Mains over/undervoltage (ANSI# 59/27)
• Mains over/underfrequency (ANSI# 81O/U)
• Mains phase shift (ANSI# 78)
• Generator over/undervoltage (ANSI# 59/27)
• Generator over/underfrequency (ANSI# 81O/U)
• Generator overload (ANSI# 32)
• Generator reverse/reduced power (ANSI# 32R/F)

Option X Features:

Models:
SPM-D21/PSVX

• Analog bias outputs for voltage and speed freely configurable
• Speed bias output configurable as 500 Hz PWM output with adjustable voltage level

• Two raise/lower outputs configurable for either speed or voltage

Certifications / registrations: UL/cUL, CE

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