MTR-3
Installation Instructions
DEIF A/S
Page 22 of 51
Pulse output functionality
A corresponding energy counter (up to 4) can be assigned to a pulse output. A number of pulses
per energy unit, pulse length, and a tariff in which output is active are set.
Calculation of recommended pulse parameters
Number of pulses per energy unit should be in certain limits according to expected power. If not
so, the measurement from pulse output can be incorrect. Settings of current and voltage
transformers can help in estimation of expected power.
Principle described below for pu
lse setting, where e is prefix, satisfies SIST EN 62053−31: 2001
standards pulse specifications:
eWh
p
eW
1
100
15
5
.
1
→
K
Examples:
Expected power
→
Pulse output settings
150 − 1500 kW
→
1 p/1kWh
1.
5 − 15 MW
→
100 p/1MWh
15 − 150 MW
→
10 p/1MWh
150 −
1500 MW
→
1 p/1MWh
Alarm notification functionality
An alarm notification function can also be assigned to output. In case of any alarm occurrence,
alarm output will trigger passive electromechanical relay or passive solid-state relay.
Two parameters should be defined for each alarm output:
−
The source for assigned alarm (alarm group 1, 2 or both)
−
Type of output signal when alarm is detected.
General purpose digital output
This functionality allows user to enable/disable output relay by software settings (when
appropriate values are set in Modbus table).
MODULE NUMBER
MODBUS REGISTER
REGISTER VALUE
Module 1 (if installed)
40722
3 - ON
4 - OFF
Module 2 (if installed)
40725
3 - ON
4 - OFF
Module 3 (if installed)
40728
3 - ON
4 - OFF
Module 4 (if installed)
40731
3 - ON
4 - OFF
Pulse parameters are defined by
SIST EN 62053−31 standard. In the section
“Calculation of recommended pulse parameters” below, a simplified rule is
described to assist you in setting the pulse output parameters.
