Broyce Control Ltd., Pool Street, Wolverhampton, West Midlands WV2 4HN. England
Telephone: +44 (0) 1902 773746 Facsimile: +44 (0) 1902 420639 Email: sales@broycecontrol.com Web: http://www.broycecontrol.com
The information provided in this literature is believed to be accurate (subject to change without prior notice); however, use of such information shall be entirely at the user’s own risk.
M3PRT2
-
2
-
A
Type: M3PRT/2 & M3PRT/2-4W
Phase Failure, Phase Sequence and Under Voltage plus Time Delay
q 35mm DIN rail housing
q Microprocessor controlled with internal monitoring (self-checking)
q Monitors own supply and detects an Under voltage condition on one or more phases
q M3PRT/2 measures phase to phase voltage and M3PRT/2-4W measures phase to neutral voltage
q Detects incorrect phase sequence, phase loss and neutral loss (4-wire only)
q Adjustment for under voltage trip level
q Adjustment for time delay (from an under voltage condition)
q 1 x DPDT relay output 8A
q Intelligent LED indication for supply and relay status
Dims:
to DIN 43880
W. 35mm
•
INSTALLATION AND SETTING
• BEFORE INSTALLATION, ISOLATE THE SUPPLY.
• Connect the unit as required. The diagram below shows a typical installation, whereby the supply to
the load is being monitored by the relay. If a fault should occur, the contactor is de-energised
removing the 3-phase supply to the load. The contactor only re-energises after the fault has cleared.
Applying power.
• Set the “trip level” and the “time delay” to minimum.
• Apply power and the green “supply on” and red “relay” LED’s will illuminate, the relay will energise
and contacts 15 and 18 / 25 and 28 will close. Refer to troubleshooting table if the unit fails to operate
correctly.
Setting the unit.
• Accurate setting can be achieved by adjusting the “trip level” until the unit trips (relay de-energises)
then by decreasing the “trip level” setting until the relay re-energises. By close setting of the “trip
level”, the unit will also detect a phase loss even with a large percentage of re-generative voltage.
• In order to set the unit as previously described but without causing disruption to the equipment being
controlled/monitored, set the “time delay” to maximum. It will now be possible to establish the trip
point when the red “relay” LED starts to flash. Decrease the trip level setting to stop the LED flashing.
(Note: If the time delay is allowed to expire, the output relay will de-energise).
• If large supply variations are anticipated, the “trip level” should be set further from the nominal
voltage.
• Set the “time delay” as required. (Note that the delay is only effective should the supply drop below
the set “trip level”. However, if during an under voltage condition the supply drops below the 2nd
under voltage trip level, any set time delay is automatically cancelled and the relay de-energises).
Troubleshooting. The table below shows the status of the unit during a fault condition.
Supply fault Green LED Red LED Relay
Phase or Neutral (4-wire only) missing Off Off De-energised
Phases reversed (no delay) Flashing Off De-energised
Under Voltage condition (during timing) On Flashing Energised for set delay (t)
Under Voltage condition (after timing) On Off De-energised
Phase below 70% of Un (fixed under trip level [2]) On Off De-energised
Phase below 50% of Un Off Off De-energised
•
TECHNICAL SPECIFICATION
Supply / monitoring
voltage U*: M3PRT/2 (L1, L2, L3) M3PRT/2-4W (L1, L2, L3, N)
77- 143V AC 44.5 - 82.5V AC
161 - 300V AC 93 - 173V AC
280 - 520V AC 161 - 300V AC
Frequency range: 48 - 63Hz
Isolation: Over voltage cat. III
Rated impulse
withstand voltage: 4kV (1.2 / 50µS) IEC 60664
Power consumption:
(max.) L1: 20VA (3-wire), 13VA (4-wire)
L2: 0.2VA (3-wire), 0.1VA (4-wire)
L3: 20VA (3-wire), 0.1VA (4-wire)
Trip levels:
Voltage range: Under [2] fixed ±2%: Under (adjustable):
77 - 143V AC (3-wire) 77V 83 - 138V
161 - 300V AC (3-wire) 161V 173 - 288V
280 - 520V AC (3-wire) 280V 300 - 500V
44.5 - 82.5V AC (4-wire) 44.5V 48 - 79V
93 - 173V AC (4-wire) 93V 100 - 166V
161 - 300V AC (4-wire) 161V 173 - 288V
Repeat accuracy: ± 0.5% @ constant conditions
Hysteresis: ≈ 2% of trip level (factory set)
Response time: ≈ 50 mS
Time delay (t): 0.2 - 10 sec (± 5%)
Note: actual delay (t) = adjustable delay + response time
Delay from
phase/neutral loss (tr): ≈ 100 mS (worst case = tr x 2)
Power on delay (Td): ≈ 1sec. (worst case = Td x 2)
Ambient temp:
-20 to +60°C
Relative humidity: +95%
Output: DPDT relay (15, 16, 18 / 25, 26, 28)
Output rating: AC1 250V 8A (2000VA)
AC15 250V 3A
DC1 25V 8A (200W)
Electrical life: ≥ 150,000 ops at rated load
Dielectric voltage: 2kV AC (rms) IEC 60947-1
Rated impluse
withstand voltage: 4kV (1.2 / 50µS) IEC 60664
Housing: Orange flame retardant UL94 VO
Weight: ≈ 100g
Mounting option: On to 35mm symmetric DIN rail to BS5584:1978
(EN50 002, DIN 46277-3) Or direct surface mounting
via
2 x M3.5 or 4BA screws using the black clips provided on
the rear of the unit.
Terminal conductor size: ≤ 2 x 2.5mm2 solid or stranded
Approvals:
Conforms to IEC. CE and Compliant.
Options:
1. For other supply/monitoring voltages, please consult the sales office.
2. For alternative time delays or trip levels, please consult the sales office.
•
FUNCTION DIAGRAM
M
o
n
i
t
o
r
e
d
3~ Supply
Output
L1, L2
L2, L3
L3, L1
(4-wire only) N
t trt tr
Td
Under trip
Hyst.
Fixed
Under trip [2]
time delay automatically cancelled as
p
h
a
s
e
d
r
o
p
s
b
e
l
o
w
2
n
d
t
r
i
p
p
o
i
n
t
Td
Phases reversed
Terminal Protection to IP20
•
MOUNTING DETAILS
45
Insert screwdriver
to release clips
8
9
(
e
x
c
l
.
c
l
i
p
s
)
49 59
Withdraw clips
fully when
surface mounting
9
3
(
+
/
-
1
m
m
)
•
CONNECTION DIAGRAM
L1 (R)
Supply / Monitored
Voltage
25
L2 (Y)
L3 (B)
N*
*N - Neutral connection
only available on 4-wire
version
LOAD
P
h
a
s
e
m
o
n
i
t
o
r
C
o
n
t
a
c
t
o
r
L
o
c
a
l
F
u
s
e
Board
26 28
N*
15
L1
16 18
L2L3
*Please state
Supply / monitoring
voltage when ordering
Installation work must be carried
out by qualified personnel.
