DSE 8610 MKII, Operator'S Manual, Page: 176 / 188

Commissioning
057-254 ISSUE: 2 Page 176 of 188
8.2.2 METERING
CAUTION!: Failure to perform the Metering steps results in incorrect power factor and kW
calculations leading to problems with kW and kvar load sharing if not corrected.
WARNING!: Do not disconnect this plug when the CTs are carrying current.
Disconnection open circuits the secondary of the C.T.’s and dangerous voltages may then
develop. Always ensure the CTs are not carrying current and the CTs are short circuit
connected before making or breaking connections to the module.
8.2.2.1
CTS ON THE RIGHT PHASE
Check to ensure that the CTs on L1, L2 & L3 are connected to their respective connection on the DSE
module.
This is tested by loading the generator with a purely resistive load (around 10% of the generator’s
size) across the three phases. If the CTs are wired correctly to the DSE module, it displays unity
power factor (1.0 pf) across all three phases. If unity power factor is not displayed the CTs have been
wired to the wrong phases on the DSE module.
8.2.2.2
CTS IN THE RIGHT DIRECTION
NOTE: Checking that the CTs are on the right phase MUST be completed prior to checking
if the CTs are in the correct direction. CTs on the wrong phase also cause negative kWs.
Check to ensure that the CTs on L1, L2 & L3 have been mounted for the correct orientation for current
flow and that the S1 and S2 have not been swapped over.
This is tested by loading the generator with a purely resistive load (around 10% of the generator’s
size) across the three phases. If the CTs’ S1 and S2 are wired to correctly to the DSE module, it
displays positive kW. If negative kWs is displayed the CTs’ S1 and S2 have been swapped around.