Relay Relay(PM1230H)
The relay is Normally Open (NO) when not triggered. When triggered (operated) it changes to Normally Closed (NC).
A relay can be triggered depending on source of operation. The supplied source can be utility, alternate source, or both.
The following parameters are associated to trigger a relay. The relay gets trigger if the mentioned conditions are met.
Relay parameters
| Parameter | Register | Triggers when | Normalizes when |
|---|---|---|---|
|
Voltage LN |
3036 |
The value is greater than the set Upper Limit (UL) or lesser than the set Lower Limit (LL). | The value is between the set UL and LL. |
|
Voltage LL |
3026 |
||
|
Frequency |
3110 |
||
|
Power Factor |
3084 |
||
|
Active Power: Present demand |
3766 |
The value exceeds the set UL. | The value drops below the set LL. |
|
Reactive Power: Present demand |
3782 |
||
|
Apparent Power: Present demand |
3798 |
||
|
Apparent Power Total |
3076 |
||
|
Reactive Power Total |
3068 |
||
|
Active Power Total |
3060 |
||
|
Current Average |
3010 |
Prepaid metering relay parameters
| Parameter | Register | UL functionality | LL functionality |
|---|---|---|---|
|
Prepaid balance register |
9638 |
The UL can be set at a maximum of 99999 kW. you can set UL only through communication. | The LL can be set to any minimum value defined. You can set
LL only through communication. When the energy credits reaches LL,
an alarm gets trigger to indicate limited consumption. This alarm
is displayed by the top most LED on the load bar blinking constantly.
When the energy credit goes to 0, the relay gets triggered. If the
energy consumption continues, the energy credits display a negative
value that is balanced after the next recharge.
NOTE: If you set LL
as 0, the alarm functionality is disabled.
|
Prepaid metering relay parameters
| Parameter | Register | UL functionality | LL functionality |
|---|---|---|---|
|
Prepaid balance register |
9638 |
The UL can be set at a maximum of 99999 kW. you can set UL only through communication. | The LL can be set to any minimum value defined. You can set
LL only through communication. When the energy credits reaches LL,
an alarm gets trigger to indicate limited consumption. When the energy
credit goes to 0, the relay gets triggered. If the energy consumption
continues, the energy credits display a negative value that is balanced
after the next recharge.
NOTE: If you set LL as 0, the alarm functionality
is disabled.
|
Two different parameters can be set simultaneously for the relay trigger functionality with separate upper and lower limits for each parameter.
-
Parameter associated with Source 1 (or 2)
-
Parameter associated with Source 2 (or 1) or both (1 and 2)
For a relay to operate, the power or demand parameter must be same as configured in the meter. The meter does not allow users to configure any other parameter apart from the configured power or demand parameters.
Only one parameter can be configured, associating it with the source (as per the system connected). The other parameter must be set to zero (with zero as UL and zero as LL).
To trigger or restore a relay status, you can manually program a time delay. The delay can be set between 1-60 seconds. The set time enables the triggering or restoration of the associated relay during a fault occurrences.