Always on the safe side with Xpole – the PDIM residual current monitor

Residual current devices, which have been well introduced into the market, now receive “preventive” support from the PDIM residual current monitor.
The IEC/EN 61008 product standard for residual current devices states that such devices must trip at a range between 50 to 100 percent of the nominal residual current specified.
This means that a 30 mA residual current device intended for customary personal protection, for example, may trip starting at 15 mA, but must trip at 30 mA at the very latest.
Normally, when a problem arises in a system, caused by actual residual currents or by operation-related stray currents, it is noticed when it is already too late or when the residual current device has already tripped. This is frustrating in every case, especially when the tripping causes further problems such as a production standstill or a time-consuming search for the error. This could even happen on weekends!
The PDIM residual current monitor, which is just four module units wide, is a remedial measure. If such a monitor is connected in series before or after a Moeller residual current device, it makes it possible to always monitor the current system status.
The PDIM device is mounted onto a 35mm DIN rail in the distribution board. The actual residual current status can be read off from three different LEDs, if so required.
When the green LED is on, the system’s power supply is moving within a residual current range of 0 to 30 percent of the set nominal residual current (IΔN) and is OK.
The yellow LED provides a note of caution, showing a residual current that is moving within a range of 30 to 50 percent of the IΔN. This warning means that the level is rising – the residual current device does not trip here yet, but its tripping threshold is approaching.
If the red LED is on, the residual current is moving above 50 percent of the IΔN. The system is in a state of alarm and the residual current device may trip at any time from this point.
In order to avoid having to continuously obtain information on the system from the distribution board, the PDIM series provides two potential-free switching contacts which operate parallel to the yellow and red LEDs.
These universal contacts can be operated with batteries or mains voltage. Thus, any limits to their possible areas of application are precluded.
Anything is possible, from the simple actuation of external blinkers and/or buzzers, all the way to Xcomfort connections – this includes the receipt of mobile phone SMS messages when specific limit values have been exceeded.

The device, which is absolutely compatible with the existing Xpole series in terms of the busbar and its shape, is first snapped onto a 35mm DIN rail. Then the delay for the residual current device can be selected using the upper adjustment wheel. Non-delayed, type G or type S. The lower adjustment wheel can be used to set the tripping current to 30, 100, 300, 500 or 1000 mA. Optionally, it is also possible to connect signalling devices (lights, buzzers, Xcomfort inputs) at one or both outlets. The power is connected in series to the residual current device.
If the red LED becomes active, it can be turned off by turning the upper adjustment wheel to the RESET position. Then the delay for the residual current device must also be reset. A test function allows for testing of the operation of the loads/inputs connected to the alarm outlets. To do this, the lower adjustment wheel is to be turned to the TEST position. The device then alternately simulates residual currents of 30 and 50 percent of the IΔN. In this process, the yellow and red LEDs blink alternately (1Hz). Both output relays remain permanently energised.

The PDIM residual current indicator blends seamlessly into the Xpole family, and is the first product of a new generation of Moeller’s protective devices that is setting new standards in terms of safety, comfort and system availability.

Moeller GmbH, 53105 Bonn
Tel.: +49 (0)228 602-0
Fax: +49 (0)228 602-2275
E-Mail: presse@moeller.net
Internet: www.moeller.net
If you have any questions, please contact:
Corporate Communications, Tel.: +49 (0)228 602-2915

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