This new series of relays, for flush mounting according to DIN 72x72mm, on top of granting a high reliability level, like the previous models, have evolved the technical and mechanical characteristics.
This is the basic unit of the new series, is particularly advised in those cases, in which it’s required to use a reduced flush mounting ELR’s option, without other particular options. One of its main novelties is the reduced depth (60mm including terminals).
It may be coupled to any of our Toroidal Transformers of the CT-1(close core) and CTA-1 (split core) families.
There are various versions, in order to meet different auxiliary supply requirements. Their wide time and current setting ranges, allows to easily select the tripping characteristics, in order to maintain the contact values below 50 V, as required by the IEC standards.
This is also the suitable answer for a proper selectivity,whenever there are other ELR’s or/and RCD’s downstream or upstream in the line to be protected
The instrument , fitted with filters at the input circuits, is practically immune to external disturbances, so as the pulse currents with dc components, complying with the requirements ofVDE0664 and project IEC 23 Standards.
The present model, on top of the previous basic unit characteristics, it’s fitted with following features:
a) a double output changeover contact, one can be used for disconnection and the other for an alarm function at 70% of the set current (the selection of the working type of the second contact is being made by means of a dipswitch)
b) selectable negative or positive safety (fail safe) by means of a dipswitch
杭州嘉瑞电气有限公司 JR Electric(China) Co.,Ltd. 地址:杭州凤起东路8号江能大厦505/529室 邮编(Zip):310020
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