Broyce Control Ltd., Pool Street, Wolverhampton, West Midlands WV2 4HN. England
Tel: +44 (0) 1902 773746 Fax: +44 (0) 1902 420639 Email: sales@broycecontrol.com Web: 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.
MXPRF-2-
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Type: MXPRF
Phase Failure, Phase Sequence and Under Voltage
17.5mm DIN rail housing
True R.M.S.
Microprocessor based (self checking)
Monitors own supply and detects an Under voltage condition on one or more phases
Measures phase to phase voltages
Detects incorrect phase sequence and phase loss
Fixed under voltage trip level
Fixed time delay
1 x SPDT relay output 8A
Intelligent LED indication for supply and relay status
Dims:
to DIN 43880
W. 17.5mm
• INSTALLATION AND SETTING
• BEFORE INSTALLATION, ISOLATE THE SUPPLY.
• Connect the unit as required. The Connection Diagram below shows a typical installation, whereby
the supply to a load is being monitored by the Phase monitoring relay. If a fault should occur (i.e. fuse
blowing), the relay will de-energise and assuming control of the external Contactor, de-energise the
Contactor as well.
Applying power.
• Apply power and the green “Power supply”X and red “Relay”Y LED’s will illuminate, the relay will
energise and contacts 15 and 18 will close. Refer to troubleshooting table if the unit fails to operate
correctly.
Note:
If the supply voltage increases above the maximum supply/monitoring voltage range by approx. 10% or
more, the relay will de-energise immediately.
This device is not suitable for applications where there could be a percentage of re-generative voltage
present during a fault condition, i.e. fuse failure. During these conditions a monitor that includes an
adjustable under voltage trip level is necessary which allows this type of fault to be detected. It is therefore
recommended that the Mxprt or Mxprt-4w phase monitors be considered.
Troubleshooting.
The table below shows the status of the unit during a fault condition.
Supply fault Green LED Red LED Relay
Phase missing On Off De-energised
Phases reversed (no delay) Flashing Off De-energised
Phase below 70% of Un (fixed under trip level [2]) On Off De-energised
•
TECHNICAL SPECIFICATION
Supply / monitoring
voltage U* (L1, L2, L3): 77- 143V AC
161 - 300V AC
280 - 520V AC1
Frequency range: 48 - 63Hz
Isolation: Over voltage cat. III
Rated impulse
withstand voltage: 4kV1 (1.2 / 50μS) IEC 60664
Power consumption: 8VA max.
Trip level:
Voltage range: Under fixed ±2%:
77 - 143V AC 77V
161 - 300V AC 161V
280 - 520V AC 280V
Hysteresis: ≈ 2% of trip level (factory set)
Repeat accuracy: ± 0.5% @ constant conditions
Immunity from micro
power cuts: <50 mS
Response time: ≈ 50 mS
Time delay (t): ≈100 mS
Note: actual delay (t) = delay + response time
Delay from
phase loss (tr): ≈ 150 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 (15, 16, 18): SPDT relay
Output rating: AC1 250V 8A (2000VA)
AC15 250V 5A (no), 3A (nc)
DC1 25V 8A (200W)
Electrical life: ≥ 150,000 ops at rated load
Dielectric voltage: 2kV AC (rms) IEC 60947-1
Rated impulse
withstand voltage: 4kV (1.2 / 50μS) IEC 60664
Housing: Orange flame retardant UL94 VO
Weight: ≈ 70g
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 and RoHS Compliant.
EMC:
Immunity: EN/IEC 61000-6-2 (EN/IEC 61000-4-3 15V/m
80MHz - 2.7GHz)
Emissions: EN/IEC 61000-6-4
• FUNCTION DIAGRAM
M
on
i
tore
d
3~ Supply
Output
L1
L2
L3
tt
Td
Hyst.
Fixed
Under trip
Td
Phases reversed
t
Terminal Protection to IP20
•
MOUNTING DETAILS
45
Insert scre wdriver
to release clips
89
(
excl. clips
)
49 59
Withdraw clips
fully when
surface mounting
93
(
+
- 1mm
)
• CONNECTION DIAGRAM
L1
Supply / Monitored
Voltage
L1
15
L2
L2
L3
Phase monitor
Contactor
L
oca
l
F
use
Board
L3
16 18
Installation work must be carried
out by qualified personnel.
*Please state
Supply / monitoring
voltage when ordering
•
SETTINGS
X
Y
1. Power supply status
(Green) LED.
2. Relay output (Red)
LED.