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1
Overview
The GAC SYC6714 accessory module adjusts a speed control unit to
obtain an equal AC phase relationship between the generator and the
main bus (mains). When paralleling a synchronous generator to a main
bus, generators, or utility.
The SYC6714 provides the SYNC CHECK function which activates a
relay to connect the generator to the main bus. Typically this takes less
than 3 seconds when the generator sets are at rated speed and using
optimum speed controller performance settings.
The GAC SYC6714 is a CE (Community Europe) approved unit the
installation requirements must be met to maintain EMC capabilities.
2
SpeCifiCatiOnS
GENERATOR AND MAIN BUS AC INPUT
Sensitivity
Frequency
Isolation
Burden
BATTERy/DC POwER SUPPly REqUIREMENTS
(TERMINAlS 8-10)
Low Voltage Range
(Terminals 8 & 9 connected)
High Voltage Range
Current Required
PERfORMANCE (wITh
ESD
Capture Range
Output Voltage
Breaker Closure Window Angle
Relay Contact Rating
(N.O. or N.C.)
Phase Error Adjust Range
SYC6714
Synchronizer
50 V RMS - 500 V RMS
(line-to-line or line neutral)
50 or 60 Hz nominal
1000 V minimum
less than 2.5 V A
10 - 16 V DC
14 - 40 V DC
less than 200 mA
SERIES)
+4% based on 3250 Hz
3 - 7 V DC
1 ° - 25 °
10 A @ 28 V DC
+/- 10° typical
ENvIRONMENTAl
Temperature Range
Humidity
Vibration
Corrosion resistant and fungus proof IP22
Case
PhySICAl
Dimensions
Weight
Mounting
1
Governors America Corp. © 2021 Copyright All Rights Reserved
-40 to +180° F [ -40 to +85°C]
up to 100 %
5g (20 – 200 Hz)
with terminal cover in place
5.72 [146] x 7.03 [179] x 1 in [25]
1.5 lb [0.68 kg]
any position, vertical preferred
SYC6714 03-2021-B2
PIB4030
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Summary of Contents for GAC SYC6714
- Page 1 SYC6714 Synchronizer Overview The GAC SYC6714 accessory module adjusts a speed control unit to obtain an equal AC phase relationship between the generator and the main bus (mains). When paralleling a synchronous generator to a main bus, generators, or utility.
- Page 2 The SYC6714 can be mounted in a cabinet with other equipment. Limit exposure of the unit to extreme temperatures. Mount the SYC6714 vertically if exposed to moisture or wetness to prevent accumulation inside the unit. The governor system must be in good working order and adjusted correctly for the synchronizer to properly operate in the system. The SYC6714 is factory set to near optimum settings, therefore, large increment adjustments are not normally needed.
- Page 3 Phasing of main power (MAINS) and the generator signals occurs when Terminals 1 and 3 are in phase. Paralleling out-of-phase generators may cause equipment damage. High AC Voltage may be present at Terminals 1 thru 4. De-energize and check voltages before use. SYC6714 03-2021-B2 PIB4030 Governors America Corp. © 2021 Copyright All Rights Reserved...
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Page 4: Initial Adjustment
ADJUSTING AND OPTIMIZING GAIN On the SYC6714, adjust GAIN by turning GAIN Adjustment. as far clockwise (CW) as possible without causing instability in the system, then turn the GAIN adjustment one division counterclockwise (CCW). When the system is unstable, the main breaker is inhibited from closing. - Page 5 MATChING AND MONITORING GAC offers additional modules for support. The VMA100, when combined with the SCY6714 combines all the voltage monitoring functions and adjustment functions.
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Page 6: Troubleshooting
Severe harmonic distortion of the AC wave from the power converters can disturb the synchronizer. If the wave form has more than 10% distortion, or other wave form issues are suspected, contact GAC for an external AC filter recommendation. SYC6714 03-2021-B2 PIB4030 Governors America Corp. © 2021 Copyright All Rights Reserved...