Series E90 Interface EN/IEC 62019
• Especially designed for MCBs Series EC90 up to 32A.
• Can be coupled on both sides of MCBs.
• Version with golden contacts, available for low current as well as low voltage applications.
• Stack-on left or right up to 4 H units.
• Permits the pass-through of busbars, pin & fork, top and bottom, just changing the position of the base of the auxiliaries.
Application
The auxiliary contact CAH has a double function:
1. The standard function as auxiliary monitoring contact for which it has been developed.
2. The interface function, which allows the use of all auxiliaries in combination with the Series EC MCB range.
Example: to couple the undervoltage release NUVR to a Series EC90, the CAH 672977 has to be added in between the MCB and the NUVR as interface.
The auxiliary contacts are units to be added on to protection devices. They allow information to be monitored from a distance about the protection devices.
Auxiliary contact  (function CAH)
Provides the status of the protection device, OPEN/CLOSED.
Signal or auxiliary contact (function CAS/H)
This auxiliary can act as an auxiliary contact (function CAH) or as a signal contact (function CAS/H). The user can change the function at the moment of installation. Used as signal contact (function CAS/H) it provides the information about the automatic tripping of the protection devices: overload or short-circuit for MCBs, earth leakage tripping for RCDs.
• The device has a test button on the front to simulate the function (acting as a function H or S)
• Reset button for the contacts (function S)
• Tripping signal on the front (function S)