SPM-D21 Series

Synchronizer with Mains Decoupling

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

Features include:

Synchronization for one or two circuit breakers
Phase match or slip frequency synchronization with voltage matching
Outputs for speed and voltage bias signals
Active power and power factor control
Analog input to control active power set point externally
Generator and mains protection included
Discrete inputs for operating mode selection
Two-line liquid crystal text display for operation, alarm indication, and visualization of measuring values
LED synchronoscope
PC and front panel configurable

Packages

The SPM-D21 Series is available with different feature packages. The following table shows the differences between these packages.

	SPM-D21 Series
Model	SPM-D21 (12/24 Vdc)	SPM-D21
Package	PSV	PSVX
Analog controller (voltage bias)	---	1
Analog controller (speed bias)	---	1

Specifications

Power supply	24 Vdc (+/- 25%)
Consumption	max. 10W
Ambient temperature	-20 to 70 °C
Ambient humidity	95 %, non-condensing
Voltage AC input	115Vac or 400Vac true RMS
Accuracy	Class 1
Current AC input	1A or 5A true RMS
Accuracy Iac	Class 1
Discrete inputs (isolated)	Range: max. 250 Vac/dc
Relay outputs	Isolated
Load (resistive)	2A@24Vdc and 250Vac
Housing
Front panel mounting	Plastic housing
Dimension (WxHxD)	144 × 72 × 122 mm
Sealing (front/back)	IP42/IP21
Weight	Approx. 800 g