Mikro DIN310C User manual

DIN310C Earth Leakage Relay User's Manual
A BRIEF OVERVIEW
1. DESCRIPTION
a - Trip status indicator
c Up button
d Down button
e Reset button
f Integral test button
g DP1 indicator
a
c
d
e
f
g
h
i
Symbols
I - Sensitivity
t - Time delay
Flt 1 - Fault record #1 (Most recent)
n
Flt 2 - Fault record #2
Flt 3 - Fault record #3 (Oldest)
b
b Model
-
-
-
-
-
-
-
h FUNC display
i DATA display
-
The DIN310C series is microprocessor based earth leakage relay designed for measuring the low-level current
from the live part of the installation to the earth in the absence of the insulation fault. A zero sequence current
transformer (ZCT) will be included in the DIN310C bundle and is connected to the relay and function as the
sensor for sensing the leakage current. All conductors of the circuit to be protected shall go through the ZCT.
Each individual DIN310C and ZCT are matched and calibrated together in the factory as a complete unit. Using
other ZCT that is not included in the bundle is inhibited and will affect the tripping accuracy. This earth leakage
relay series is mainly used for multipoint tankless water heater application. The sensitivity and tripping time delay
is fixed at 10mA and instantaneous tripping respectively.This series also allows users to be able to differentiate
between overload tripping or earth leakage tripping and has the ability to detect ZCT connection fault.
C

2. LIGHT INDICATORS
[Trip]
LED
[FUNC]
display
[DP1]
indicator
[DATA]
display
Status
0
0
0
0
No auxiliary supply
0
X
X
1
Normal condition, no tripping
10 0 B Relay tripped
01 0 1 Scroll through setting
01 1 1 Scroll through records
1X X “Ct” ZCT connection fault
X
X
X
“tSt”
Manual trip test
Table 1: Relay status displayed
1 = ON 0 = OFF X = Don't care
B = Normal blink
3. PUSH BUTTONS OERATION
a. Integral Trip Test:
•Press the [TEST] button to perform an integral test on the relay ranging from the analog sensing
circuitry to output contact of the relay as well as the relay indicators and display.
b. Leakage Fault Trip Reset: / Manual Test Trip Reset:
•Press the [RESET] button once.
c. ZCT Connection Fault Reset:
•Press the [RESET] button once.
•Reset is inhibited if the fault is not rectified.
d. Parameters Viewing:
•Press button to step through the various functions.
[FUNC]
[DP1]
Symbols
Description
Blank
Off
Real-time leakage current display (Default)
1
Off
I∆n
Sensitivity (A)
2
Off
∆t
Trip time delay (seconds)
A
On
Flt 1
Fault record #1 (Most recent)
b
On
Flt 2
Fault record #2
c
On
Flt 3
Fault record #3 (Oldest)
Table 2: List of [FUNC] code displayed
[ ] or [ ]
▲▼
•Reset is inhibited if fault persists.

4. RECORDS
a. Record the 3 latest tripped faults current or “tSt” for manual trip test.
b. The records are stored in non-volatile memory.
c. To clear the entire record database:
•Step 1: Press button until the [FUNC] digit shows “A”.
•Step 2:
5. TECHNICAL DATA
AUXILIARY SUPPLY
DIN310C-230A............................................................... 184~276 VAC
Rated frequency............................................................. 50Hz
VA rating.........................................................................3 VA typical
SETTING
Sensitivity........................................................................10mA
Time Delay.....................................................................Instantaneous
RECORD
Fault record.................................................................... 3 latest trip fault current or “tSt” for manual trip test
Storage...........................................................................Non-volatile memory
OUTPUT CONTACT
Contact rating................................................................. 5A(NO) / 3A(NC) / 250V AC1
Contact arrangement......................................................Change over
Expected electrical life....................................................10,000 at rated current
Expected mechanical life................................................5,000,000 operations
[ ] or [ ]
▲▼
Press [ ] and [ ] buttons simultaneously and hold for 3.5s until the [DATA] shows “0”.
▲▼
INDICATORS
Leakage trip delay time.................................................. Red indicator
Leakage trip....................................................................7-segment display and red indicators
Manual test trip...............................................................7-segment display and red indicators
ZCT connection fault...................................................... 7-segment display and red indicators
Trip records.................................................................... 7-segment display
Real-time leakage current.............................................. 7-segment display
ZERO-PHASE CURRENT TRANSFORMERS
To operate with Mikro's ZCT series of current transformers
MECHANICAL
Mounting.........................................................................Standard 35mm DIN rail mounting
Approximate weight........................................................0.4kg (Relay)
Approximate weight........................................................ 0.095kg (ZCT)

6. CONNECTION DIAGRAMS
7. DIN310C CASE DIMENSION
TRIP
CONTACT
LOAD
L1 L2 L3 N PE
62 3 4 5 71
8 9 10 11 12 13 14
L N
AUX
SHUNT
TRIP
MIKRO
ZCT
DIN310C
Three Phase System
Single Phase System
Front Side
71 mm
20mm
45 mm
20mm
70 mm
85 mm
30 mm 20 mm 20 mm
The EARTH wire
must not pass
through the ZCT
TRIP
CONTACT
LOAD
L N PE
62 3 4 5 71
8 9 10 11 12 13 14
L N
AUX
SHUNT
TRIP
MIKRO
ZCT
DIN310C The EARTH wire
must not pass
through the ZCT
COM NO NC
COM NO NC
6mm
160mm
24mm
50mm
76mm
mm05
mm72
4mm
AWG20
mm31
8. ZCT DIMENSION