84872151 Crouzet USA, 84872151 Datasheet - Page 4

• Manufacturer Part Number: 84872151
• Description: VOLTAGE MONITORING RELAY, SPDT, 100V
• Manufacturer: Crouzet USA
• Series: MUS/MUSFr

Specifications of 84872151

• Contact Configuration: SPDT
• Power Consumption: 3.9VA
• Supply Voltage Max: 100V
• Relay Mounting: DIN Rail
• Control Voltage Type: AC / DC
• Relay Terminals: Screw
• Mounting Type: DIN Rail
• Control Voltage: 24V
• Current, Rating: 5 A
• Function: General Purpose
• Power, Rating: 1250 VA
• Relay Type: Electro Mechanical
• Voltage, Control: 48 VAC/VDC
• Voltage, Rating: 250 VAC/VDC
• Frequency: 50/60 Hz
• Carry Current: 5A
• Control Voltage Min: 24V
• Rohs Compliant: Yes
• Control Voltage Max: 48V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Principles
MUSF - Under and overvoltage controller in
window mode
B
C
D
E
F
G
Dimensions (mm)
MUS - MUSF
Connections
MUS - MUSF
B
Delay on threshold crossing (Tt)
Relais
High threshold
Low threshold
Hysteresis
Controlled signal
Un
1
2
N
L1
L2
L3
1 A fast-blow fuse or cut-out
3,5
5
F1
Tt
1
12
A1
60
44
5
11
23,2
Tt
14
A2
R
– KM1
5,5
3
4
3
6
W1
U1
V1
3
MUSF relays operate in window mode: they check that the controlled voltage stays between a
minimum and maximum threshold.
The under and overvoltage threshold values are set by two graduated potentiometers by reading
the Un scale to be monitored directly.
The hysteresis is fixed, value: 3 % of the preset thresholds.
If the controlled voltage exceeds the preset upper threshold, or falls below the preset lower
threshold for longer than the time set on the front face (0.1 to 10 s), the output relay opens and
LED R is extinguished. During the time delay, this LED flashes.
Once the voltage returns to below the upper threshold value minus the hysteresis, or above the
lower threshold value plus the hysteresis, the relay closes instantaneously.
When the unit is powered up with a measured fault, the relay stays open.
M1
17,5
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