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The calibrated energy meter can be used to acquire and bill active energy in industrial, household, commercial and building management applications.
Relevant values are transmitted to data logging, billing and optimizing systems, as well as to building automation and control technology applications, by means of a pulse output, or via LON, M-Bus or L-Bus interface.
S0 Pulse Output /  /  / L-Bus
Installation itself is extremely simple because the meter detects connection errors, which are indicated immediately. Maximum convenience is assured by displaying active power, which provides immediate information regarding momentary circuit load. If more information about the electrical system is required, functionality is simply expanded.
- Professional energy meters for 2, 3 and 4 wire systems with 65 A direct connection, or 1 A or 5 A transformer connection
- Accuracy class B for industrial and commercial use, as well as for household use with highly demanding requirements
- Cost savings thanks to initial calibration at the factory in accordance with MID, conformity assessment procedure modules B and D
- Calibration even with adjustable transformation ratios
- Configurable, multifunctional variants for acquiring reactive energy and mains quantities
- Installation errors display: phase sequence, phase failure, transformers with reversed polarity, overload
- Universal pulse output with adjustable pulse rate and pulse duration, as well as selectable voltage range
- Flexible communication via integrated LON, M-Bus or L-Bus interface
- Full functionality even when the electrical circuit is switched off thanks to failsafe 24 V auxiliary voltage
 Tamper-proof cover, configuration disabling- 3 Years Warranty
- Made in Germany
Multifunctional Variants
Depending on the type of multifunctional variant, the meter is also capable of acquiring reactive power and displaying up to 26 additional measured quantities.
As a result, voltage level, utilization of individual phases, reactive power component and the functioning of compensation systems can be evaluated at any time by simply pressing a button without any additional measuring equipment. Refer to the table for details.
| Measuring Function |
Feature |
| Measured Quantity |
Total |
Phase |
M0 |
M1 |
M2 |
M3 |
| Active energy (kWh) |
x |
|
x |
x |
x |
x |
| Active power (kW) |
x |
|
x |
x |
x |
x |
| Reactive energy (kVArh) |
x |
|
|
|
x |
x |
| Reactive power (kVAr) |
x |
|
|
|
x |
x |
| |
|
|
|
|
|
|
| Voltage (V) |
|
x |
|
x |
|
x |
| Current (A) |
|
x |
|
x |
|
x |
| Active power (kW) |
x |
x |
|
x |
|
x |
| Reactive power (kVAr) |
x |
x |
|
x |
|
x |
| Apparent power (kVA) |
x |
x |
|
x |
|
x |
| Power factor (cos phi) |
x |
x |
|
x |
|
x |
| Frequency (Hz) |
x |
|
|
x |
|
x |
Extensive Initial Calibration at the Factory
The meters comply with the MID directive which is valid throughout Europe and in Switzerland, and are shipped with initial factory calibration. They can be used immediately for billing purposes. Lead-times and costs are reduced as a result. Conformity assessment is conducted in accordance with modules B and D, and a declaration of conformity is included in the operating instructions.
Scalable Functionality
The energy meter can be ideally matched to the measuring task – and the customer only pays for what it actually required.
| Configuration Table |
|
Direct Connection |
Transformer Connection |
| |
|
5 (65) A |
5 (6) A and 1 (6) A |
Active Energy Meter
with
Power Display |
2-wire system |
U1281 |
|
U1381 |
|
|
| 3-wire system |
|
|
|
U1387 |
|
| 4-wire system |
|
U1289 |
|
|
U1389 |
| Input voltage |
100 to 110 VL-L |
|
|
|
U3 |
U3 |
| 230 VL-N |
U5 |
|
U5 |
|
|
| 400 VL-L |
|
|
|
U6 |
U6 |
| 500 VL-L |
|
|
|
U7 |
|
| Pulse output |
S0 standard, calibrated 1 |
V1 |
V1 |
V1 |
V1 |
V1 |
| Programmable S0 1 |
V2 |
V2 |
V2 |
V2 |
V2 |
| 230V standard, calibrated 1 |
V3 |
V3 |
V3 |
V3 |
V3 |
| 230 V programmable 1 |
V4 |
V4 |
V4 |
V4 |
V4 |
| Customer-specific S0, calibrated 1 |
V9 |
V9 |
V9 |
V9 |
V9 |
| Transformer ratios |
CT = VT = 1, main display for secondary, calibrated |
|
|
Q0 |
Q0 |
Q0 |
| |
CT, VT, programmable aux. display Secondary, calibrated |
|
|
Q1 |
Q1 |
Q1 |
| |
CT, VT, fixed, main display, primary calibrated |
|
|
Q9 |
Q9 |
Q9 |
| Approval |
MID |
P8 |
P8 |
P8 |
P8 |
P8 |
| Options |
|
|
|
|
|
|
Multifunctional
Variant |
U, I, P, Q, S, PF, f |
M1 |
M1 |
M1 |
M1 |
M1 |
| Reactive energy |
M2 |
M2 |
M2 |
M2 |
M2 |
| Reactive energy, U, I, P, Q, S, PF, f |
M3 |
M3 |
M3 |
M3 |
M3 |
| Bus connection |
LON |
W1 |
W1 |
W1 |
W1 |
W1 |
| M-Bus |
W2 |
W2 |
W2 |
W2 |
W2 |
| L-Bus |
W3 |
W3 |
W3 |
W3 |
W3 |
| Ext. Auxiliary voltage |
24 V DC 2 |
H1 |
H1 |
H1 |
H1 |
H1 |
1 In the case of U138x transformer meters with option Q9, the pulse rate is read out with reference to the primary winding.
2 Not in combination with 230 V pulse output – V3, V4
|
