The BJ-194 series Multifunction Power Meter, once cabled and connected is seen to give a correct voltage and current reading, but shows negative values for active power (generation).
This is an error with the cabling for the current transformer secondary; the direction of the transformer current has to be respected as shown in the connection diagram. The current transformers have a two face primary; the current must pass from P1 to P2 giving the result in secondary (S1 and S2) of 5 amps.
The error stems from:
a). The current transformers have been incorrectly installed. As a result it gives the direction of the current as passing from P2 to P1; to resolve this problem, the current transformer does not have to be dismantled and installed again, but the transformer secondary (S1 and S2) just has to be inverted.
b). The connection of the current secondary in the current transformers have been incorrectly connected; to resolve this problem just connect the S1 transformer secondary to the S1 on the meter and the S2 on the current transformer to the S2 on the meter
The BJ-194 series Multifunction Power Meter, once cabled and connected, is seen to give an incoherent Power factor and CosΦ reading (-0.01 or similar).
This is again a current transformer and voltage phase connection error phase A, must correspond to the current transformer installed in phase A; phase B, must correspond to the current transformer installed in phase B; and phase C, must correspond to the current transformer installed in phase C.
This connection is clearly shown on the back of the analyzer.
The BJ-194 series Multifunction Power Meter is measuring in average voltage and is displaying the secondary voltage (for example 110 volts).
Ensure that the voltage Transformer ratio has been correctly set (please refer to the user manul).
The BJ-194 series Multifunction Power Meter does not correctly display the current reading. It shows values varying between 0 to 5 amps of current.
Ensure that the Transformer ratio has been correctly set; once correctly set the current measurement shall be shown correctly (please refer to the user manul).
Maintenace of the power meter
These type multifuction meter does not require any special maintenance. No adjustment, maintenance or repairing action should be done when the instrument open and powered on, should those actions are essential, high-qualified operators must perform them.
Before any adjustment, replacement, maintenance or repairing operation is carried out, the instrument must be disconnected from any power supply source.
When any protection failure is suspected to exist, the instrument must be immediately put out of service. The instrument's design allows a quick replacement in case of any failure.
Blue Jay's Panel Power Meter with universal (AC / DC) power input, Instruments limit work power supply: AC / DC (85-265V), please ensure that the auxiliary power can match for meter to prevent damage to the product.
This type meter have complete over-voltage and under-voltage protection, if your local can not find stable aux power supply, and need to use the power supply for phase to phase voltage, please contact Blue Jay's sales team for 220V/110V transformer power supply, this is anti-harmonic type to prevent frequent trigger over-voltage protection. (in protection trigged, the meter will automatic off power untill user restart the meter manually)
A. Suggest install 1A fuse in the fire line side.
B. For the areas with poor power quality, suggest install lightning surge suppressor and rapid burst suppressor to prevent lightning strikes.