GEA Bock HGZ7 - Manual (Page 24)

24
D
GB
F
E
09726-11.2014-DGbF
400 V
Direktstart YY Teilwicklungsstart Y/YY
1V1 1W1 1U1
2W1 2V1 2U1
L3 L2 L1 L3 L2 L1
L3 L2 L1
1V1 1W1 1U1
2W1 2V1 2U1
Direct start Part winding start
6| Electrical connection
6.3 Standard motor, design for direct or partial winding start
The motor is wired for direct start (YYY resp. YY) at the factory. For part winding start Δ/YYY resp.
Y/YY the bridges must be removed and the motor feed line connected according to the circuit diagram:
INFO A mechanical unloaded start with bypass solenoid valve is
not required.
Designation on the name plate Sticker on the terminal box
until A018 from A040 until A018 from A040
∆/YYY Y/YY
Y/YY
Compressors with this marking are suitable for direct or partial winding start. The motor winding is
subdivided into two parts:
Until type code A018: Part winding 1 = 60% and part winding 2 = 40%. This winding division
reduces the start-up current needed for a part winding start to approx. 65% of that for a direct start.
From type code A040: Part winding 1 = 50% and part winding 2 = 50%. This winding division
reduces the start-up current needed for a part winding start to approx. 50% of that for a direct start.
ATTENTION Failure to do this results in opposed rotary fields and results in
damage to the motor. After the motor starts up via partial winding
1, partial winding 2 must be switched on after a maximum delay
of one second . Failure to comply can adversely affect the service
life of the motor.
INFO When testing coils with resistance tester, please note that partial
winding 1 and partial winding 2 are wired internally in HGZ7.