ABB Relion 670 Series RES670, Техническое руководство

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Maximum 72 outputs may be activated simultaneously with influencing
factors within nominal range. After 6 ms an additional 24 outputs may be
activated. The activation time for the 96 outputs must not exceed 200 ms.
48 outputs can be activated during 1 s. Continued activation is possible
with respect to current consumption but after 5 minutes the temperature
rise will adversely affect the hardware life. Maximum two relays per
BOM/IOM/SOM should be activated continuously due to power
dissipation.
21.2.11 mA input module (MIM)
21.2.11.1 Introduction
The milli-ampere input module is used to interface transducer signals in the –20 to +20
mA range from for example OLTC position, temperature or pressure transducers. The
module has six independent, galvanically separated channels.
21.2.11.2 Design
The Milliampere Input Module has six independent analog channels with separated
protection, filtering, reference, A/D-conversion and optical isolation for each input
making them galvanically isolated from each other and from the rest of the module.
For configuration of the input signals, refer to section "Signal matrix for mA inputs
SMMI" .
The analog inputs measure DC current in the range of +/- 20 mA. The A/D converter has
a digital filter with selectable filter frequency. All inputs are calibrated separately The
filter parameters and the calibration factors are stored in a non-volatile memory on the
module.
The calibration circuitry monitors the module temperature and starts an automatical
calibration procedure if the temperature drift is outside the allowed range.
1MRK 511 365-UUS A
Section 21
IED hardware
Phasor measurement unit RES670 2.1 ANSI 791
Technical manual