Ma Input Module (Mim); Introduction; Design - ABB Relion 670 Series Technical Reference Manual

1MRK 505 208-UEN B
17.2.13
17.2.13.1
17.2.13.2
Technical reference manual
Table 459: IOM with MOV - contact data (reference standard: IEC 60255-23)
Function or quantity
Binary outputs
Max system voltage
Test voltage across open
contact, 1 min
Current carrying capacity
Continuous
1 s
Making capacity at inductive
loadwith L/R>10 ms
0.2 s
1.0 s
Breaking capacity for AC, cos
j>0.4
Breaking capacity for DC with L/
R < 40 ms
Maximum capacitive load

mA input module (MIM)

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.

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
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. The
module communicates, like the other I/O-modules on the serial CAN-bus.
Trip and Signal relays
IOM: 10
250 V AC, DC
250 V rms
8 A
10 A
30 A
10 A
250 V/8.0 A
48 V/1 A
110 V/0.4 A
220 V/0.2 A
250 V/0.15 A
-
Section 17
IED hardware
Fast signal relays (parallel
reed relay)
IOM: 2
250 V AC, DC
250 V DC
8 A
10 A
0.4 A
0.4 A
250 V/8.0 A
48 V/1 A
110 V/0.4 A
220 V/0.2 A
250 V/0.15 A
10 nF
"Signal matrix for mA
647