Over voltage protection device UZM-51MD

IN DEVELOPING
Устройство защиты и обнаружения дуги УЗМ-51МД
UZM-51MD AC230V UHL4
2600.00 руб. с НДС

UZM-51MD AC230V UHL2
3120.00 руб. с НДС

 
  • Arc Fault circuit interrupter (AFCI) = Arc Fault device detector (AFDD)
  • Protection from arcing and dangerous spark in the wiring
  • Two-threshold overvoltage protection
  • Two-threshold undervoltage protection
  • Built-in protection from impulse spikes line voltage
  • Nominal/maximum switching current is 63A/80A at 250V
  • Operates over a wide supply voltage range - 0...440V
 
AN EXAMPLE OF THE ARC IN THE WIRING
Пожар в квартире
 
Network failure and possible means of protection
Accident types
Possible reasons
Possible consequences without protection
Possible means of protection
Consistent arc
Network failure - consistent arc
- Bad contact at the wall outlet
- Bad contact in screw connections
- Damaged wire
Ignition and fire
UZM-51MD
Parallel arc
Network failure - parallel arc
- Damaged/insufficient insulation wires
- Water ingress into open contacts
Ignition and fire
MCB + UZM-51MD
Parallel arc to the ground
Network failure - parallel arc to the ground
- Damaged/insufficient insulation wires
- Water ingress into open contacts
Ignition and fire
RCD + UZM-51MD
Power surge
Network failure - power surge
- The accident at the КТП
- Open ground from КТП to consumers
- Error electrician at repair
Failure of electrical equipment & ignition 
UZM-51MD
Voltage dip
Network failure - voltage dip
- The accident at the КТП
- Open ground from КТП to consumers
- Error electrician at repair
Failure of electrical equipment (air conditioners, compressors, pumps, refrigerators)
UZM-51MD
Voltage pulse
Network failure - voltage pulse
- Consequences of remote lightning discharge
- Switching the disturbance
Failure of electrical equipment
УЗИП III or UZM-51MD
 
Types of failures in the networks and means of protection from them
Types of  failures/Protection device UZM-51MD UZM-51M RCD The differential circuit breaker MCB УЗИП III
Consistent arc +          
Parallel arc +          
Parallel arc to the ground +   + +    
Power surge + +        
Voltage dip + +        
Overvoltage pulses + +       +
The leak current to the ground (human protection from electric shock)     + +    
Over current (short circuit)       + +  
Over current (fixed threshold with a delay)* +          
* Model UZM-51MDT with fixed current setpoint 2 to 63A
 
 The protection device arcs UZM-51MD (further - AFCI) is designed to detect arcing events (sparks) in the wiring, as well as to disable equipment with a decrease and increase in the single-phase AC voltage networks. Protects equipment connected to it (in an apartment, office, etc.) from the damaging action of pulsed power surges caused by triggering of closely spaced and connected to the same network of electric motors, magnetic starters, or electromagnets, thereby preventing the equipment damage and possible fire, followed by fire .
 The device represents a voltage control relay with a powerful electromagnetic relay at the output, supplemented varistor protection and combined with a protection device from the arc (AFCI). The unit case is made of ABS plastic, which does not support combustion (UL-94V0). The device is mounted on a DIN rail width 35 mm (GOST R MEC 60715-2003) with a front connecting wires power switched circuits. Terminals tunnel construction provides a reliable clip wires to the total cross section up to 35mm2.
 The front panel of UZM-51MD has two indicator two-color (green/red) "norm-accident" and the two-color (yellow/red) "relay-arc", manual override, knob adjustment of the upper and lower disconnection thresholds. Diagram, curcuit connection and the dimensions shown in the illustrations below.
 
Arc current, А 2,5 5,0 10 16 32
Disconnection time, s 1,0 0,5 0,25 0,15 0,12

SPECIFICATIONS OF THE UZM-51MD
A parameter
Unit
UZM-51MD
Protection parameter
Level of the voltage limit at the interferecne current 100А, not exceeds
kW
1,2
The maximum absorption energy (single pulse of 10/1000microseconds)
J.
200
The maximum absorption current single pulse 8/20/repeating pulses 8/20 microseconds
А
8000/6000
Actuction time of protection from pulse action
ns
<25
Threshold of load disconnection at increase voltage, Utop
V
240, 250, 255, 260, 265, 270, 275, 280, 285, 290
The upper threshold of accelerated load disconnection when the voltage is above the upper critical threshold, Utop.critical
V
300 ± 15
Threshold of load disconnection at decrease voltage, Ulow
V
210, 190, 175, 160, 150, 140, 130, 120, 110, 100
The lower threshold of accelerated load disconnection when the voltage is below the lowerr critical threshold, Ulow.critical
V
80± 10
Hysteresis of return the upper and lower threshold of the established value
%
3
Power supply
Rated supply voltage
V
230
Frequency of supply voltage
Hz
50
Maximum supply voltage
V
440
Power consumption
VA
1,5
Consumption of electricity
W*h
1,5
Switching capacity of contacts
Rated load current (at the section of connected conductors not less than 16mm², copper)
A
63
Rated power of load (AC250V)
kW
14,5
The maximum load current (active AC1,30min)
А
80
The maximum load capacity (AC250V-AC1,30min)
kW
20,0
The maximum allowable short-circuit current
A
4500
Technical data
Delay on/reclosing, user selectable
 
6min/10s
The delay of accelerated off the upper critical threshold
ms
20
The delay of accelerated off the low critical threshold
ms
100
The delay off when the voltage is above the upper threshold
s
0,2
The delay off when the voltage is below the lower threshold
s
10
Cross-sectional wiring of not less than
mm²
0,5-25 (20-4 AWG)
Dimensions
mm
83х35х67
The degree of pollution in accordance with GOST 9920-89   2
Class of protection relay at case level/terminal level
 
IP40/IP0
Operating temperature range (different versions)
0C
-25…+55 (UHL4)
-40…+55 (UHL2)
Storage temperature
0C
–40...+70
Immunity to interference from bursts in accordance with GOST R 51317.4.4-99 (IEC/EN 61000-4-4)   level 3 (2kV/5kHz)
Immunity to interference over voltage in accordance with GOST R 51317.4.5-99 (IEC/EN 61000-4-5)   level 3 (2kV А1-А2)
Relative humidity of air % up to 80 (at 25ºC)
Height above sea level m till 2000
Operating position in space   arbitrary
Mode   round the clock
Weight, not more kg 0,16
Service life, not less than
years
10
 
DIAGRAM OF OPERATION DEVICE
Image
 
CIRCUIT CONNECTION OF DEVICE
Схема подключения УЗМ-51МД
 
DIMENSIONS OF THE DEVICE
Габариты 35*83*62
 
Title
Order code
File to download
(manual)
File date
UZM-51MD UHL4
4640016938285
v03.04.16
UZM-51MD UHL2
4640016938927

 

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