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RN-111
Single phase voltage relay
- trip adjustment control for Umin;
- trip adjustment control for Umax;
- reset delay control Т on;
- green LED indicating that mains voltage is present;
- green LED indicating that output contacts have switched;
- input contacts;
- output contacts.
APPLICATIONS
The RN-111 Voltage Relay is designed to de-energize any power appliance/ industrial single-phase load 220V/50Hz when there are abnormal voltage variations in the mains and to energize this load automatically on return to normal operating conditions when the mains voltage parameters regenerate:
- if load power is below 3,5 kW (up to 16A) de-energization is performed directly through the relay output contacts that are connected in series with the load power supply;
- if load power is above 3,5 kW (16A) de-energization is effected by the magnetic starter of the corresponding power (MS is not supplied in the complete set) that has the relay output contacts to be connected in series with its coil power supply.
DESCRIPTION
The relay is connected in parallel to the mains supply to be monitored by the input(1-1) – (2-2)contacts. The input contacts are provided with twin terminals for ease of wiring, i.e.the 1-1 terminals are the first point of connection and the 2-2 terminals are the second point of connection. The relay has the group of two-way break-before-make output3—4-4—5contacts with a common4-4point. The4-5contacts are connected in series with a load power supply. If the load value doesn’t exceed 16 A (3, 5 kW), the4-5 contacts are directly connected to the break in the load power supply, i.e. they are connected in series with the load. If the load power is above 16 A (3,5 kW), the4-5contacts are connected in series to the coil power supply of the magnetic starter of the corresponding power that switches the load. The3-4 contacts are used in control & alarm circuits, if necessary.
When the relay trips due to overvoltage/ undervoltage, the load is de-energized by thebreak 4-5 N. C. contacts that disconnect either the load power supply directly or the magnetic starter coil power supply. The load will be automatically re-energized on return to normal conditions when voltage parameters regenerate. The automatic reset delay Ton is set by user.
To provide immunity to minor and/or short-term undervoltage avoiding excessive trippings of the relay when Umin is reached the fixed trip delay is provided. The relay will trip with 0.1 sec time delay when there is deep undervoltage/abrupt overvoltage more than 30V below/above Umin/Umax threshold setting.
Output contacts (1-2) specification
| |
Max.current under U~250V A.C. |
Max. power when contacts are closed |
Max. switch. power |
Max. long-term safe voltage A.C./D.C. |
Max. current under U=30V D.C. |
| Cosφ=0.4 |
5a |
5000VA |
4000VA |
380/150 V |
5A |
| Cosφ=1.0 |
16A |
Before the relay is plugged-in one must set the maximum and the minimum voltage trip thresholds by the front-panel contact arms of potentiometers. Also user must set the automatic reset delay according to the device that the relay is to protect (reset delay for air-conditioners, refrigerators and compressor installations is no less than 3-4 min, reset delay for other instrumentation corresponds to their operating instructions).
Adjustable trip parameters are set by user. It is recommended to set trip parameters before the relay is plugged-in.
On plugging the relay in the load will be energized after the time delay equal to the reset delay Ton has expired. Ton is set by the potentiometer.
The relay is provided with a light indication signalling that the mains voltage (input voltage) exists (the green “On” LED glows), and that the output voltage exists at the protected apparatus (the green “Load” LED glows ; it goes out when the relay trips).
The relay energizes the load with the time delay equal to the automatic reset delay Ton.
Technical brief
| Nominal voltage, V |
220 |
| Mains frequency, Hz |
48-52 |
| Adjustable trip range: |
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| for Umin threshold, V |
160 - 210 |
| for Umax threshold, V |
230 - 280 |
| Adjustable reset delay range, sec |
5 - 600 |
| Fixed trip delay when Umax is reached, sec |
0,5 |
| Fixed trip delay when Umin is reached, sec |
12 |
| Fixed trip delay when voltage is 30V below Umin threshold, sec |
0,1 |
| Fixed trip delay when voltage is 30V above Umax threshold, sec |
0,1 |
| Maximum switched current(resistive load). A, ≥ |
16 |
| Accuracy of trip threshold for voltage, V |
to 3 |
| Operating voltage, V |
400 |
| Transient withstand, V |
450 |
| Operating temperature range, °C |
-25 - + 55 |
| Hysteresis, ≥ , V |
5-6 |
| Storage temperature, °C |
-45 - + 70 |
| Total input current, mA |
to 15 |
| Life, operations |
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| under 16A load, ≥, operations |
100 000 |
| under 5A load, ≥, operations |
1 000 000 |
| Case Dimensions, (W*H*D), mm |
52x88x65 |
| Weight , ≤ , kg |
0.150 |
| Mounting |
standard DIN-rail 35 mm | Trip setting ranges and their fixed values can be changed at customer's request.
FEATURES
- trip settings (Umax, Umin, Reset delay) are adjusted in a wide range;
- fixed trip delay when voltage is 30V below/above user-set Umin/Umax threshold is provided;
- high accuracy for trip thresholds;
- fixed trip delay is provided to ignore starting voltage drops that cause nuisance tripping of the relay when Umin is reached;
- quite a high power of output contacts is provided that enables to extend the relay application range and in some instances to abandon auxiliary switching devices;
- two-way break-before make contact group in the output allows alarm signalling to operate;
- LED indicators of the mains voltage in the input and voltage in the output;
- trip/reset hysteresis for Umax/Umin is approximately 5V; it means that if the relay had tripped due to a voltage drop below Umin threshold and the load was de-energized, the relay would reset automatically and energize the load when the voltage exceeds 5V above Umin threshold (reaching the level set by hysteresis) with reset delay Ton;
- compactness, low power demand and small weight of the relay;
- mounted on a standard DIN rail.
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