The object of the TTE 7015 and TTE 7017 is to detect immediately any fault on the rotor winding of a synchronous machine, in order to give an alarm and, if required, to separate the machine from the network.
They operate on the current injection principle, d.c. for the TTE 7015 and low frequency a.c., with low levels of voltage and current (maximum 20 V or 5 mA) for the TTE 7017.

Both models are supplied in a modular plug-in case type R2, which may be mounted either as a separate relay, projecting or flush mounting, or as an element in a standard 19" rack cradle.

PROTECTION   FUNCTIONS

• Rotor earth fault [64R]

MAIN   FEATURES

• Operating level
  TTE 7015: adjustable from 1 to 2 mA
  TTE 7017: adjustable from 500 to 5000 Ohm
• Operating time
  TTE 7015: approximately 0,3 sec
  TTE 7017: <1 sec
• n.2 output units (2 NO or 1 NO + 1 NC contacts for each unit)
• Hand reset mechanical operation indicator (TTE 7015)
• Hand reset mechanical and electrical (LED) operation indicator (TTE 7017)