VR-14 Single Channel Monitoring Unit
| Model |
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| VR-14E |
English |
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| VR-14F |
Finnish |
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| VR-14D |
German |
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| VR-14S |
Swedish |
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| VR-14US |
USA |
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USA and Canada Listings UL-508 and UL-1053 |
Features of VR-14
Digital display of fault current and settings
Easy and accurate settings
Easy installation and wiring with plug-in standard measuring cables.
No wiring mistakes!
Self-testing of Monitoring unit, Measuring cable and Sum Current Transformer.
Accurate measuring values also with harmonic current.
Alarm time delay to avoid false alarm.
VR-14 can be used for:
PREVENTIVE MAINTENANCE
ON-LINE Monitoring of insulation of the Electrical System, cables, motors, ovens, heating systems, air-conditioning etc…
POWER QUALITY PURPOSE
Monitoring of wiring in a grounded Electrical System and separate sensitive electronic devices, noise isolated circuits...
TN-S, TT AND HIGH RESISTANCE
GROUNDED ELECTRICAL SYSTEMS
Monitoring that there is no Neutral to Ground connections on the load side of a Electrical system.
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For Monitoring Grounded
(TN-S) Electrical System
Immediate alarm is generated if a faulty connection is made or if a device with insulation damage is connected to the Electrical System. This is the only way to make sure that your Electrical System is ”clean”. The best personal as well as fire safety are achieved when the Electrical System is ”clean”. With a ”clean” Electrical system the Power Quality is better – less disturbance voltages and smaller voltage differences between different grounding points.
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Ground Fault Relay for
protection of 1- and 3-phase
Electrical Systems
Used for protecting devices and small Electrical Systems from ground faults or electric arcs. Please note! Ground Fault Protection relay unit is not the same as Earth Leakage Circuit Breaker (ELCB) or Ground Fault Circuit Interrupter (GFCI).
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Monitoring of
the service load
VR-14 can be used for monitoring the current of a 1-phase Electrical System. It is suitable for example for Service Centers where it can be monitored if a stove or other appliance has been left on. Another example of its use is critical networks. The current value can be supervised and an alarm will be received before the over current breaker trips.
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Monitoring Insulation
As time goes by, the electrical insulation (in motors, ovens, cables etc.) weakens and the leakage current increases. By on-line monitoring of leakage current, weakened insulation can be detected before the circuit breaker trips and production is shut down. The preventive maintenance can be done in time!
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Ground- Fault
protection of equipment.
The NEC 230-95 use.
Ground-Fault protection of equipment shall be provided for solidly grounded wye electrical services of more than 150 volts to ground, but not exceeding 600 volts phase-to-phase for each service disconnecting means rated 1000 amperes or more.
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Display
VR-14 monitoring unit has a digital display for current readings, alarms and settings.
Current values and alarm displays
| Current displays |
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Current display in mA.
The reading is 198 mA. |
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Current display in amperes (A).
The reading is 1.53 A. |
Peak current displays |
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The fault current exceeds alarm set point.
The time is less than the time delay setting.
The relay has not tripped. |
Alarm display |
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The fault current has lasted longer than
the time delay setting. The relay has tripped.
The blinking red LED and “A”-letter indicate the alarm. |
Settings
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Settings can be made by
potentiometers 1 and 2. |
Setting alarm value |
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The alarm set point is simply
adjusted by potentiometer I/A (1).
The set value is shown on the display.
Alarm set value L .300 is 300 mA.
The set point can be set in steps
mentioned on the table below.
VR-14/1,
VR-15/1
and
VR-14US/1 |
VR-14/10,
VR-15/10
and
VR-14US/10 |
VR-14/100,
VR-15/100
and
VR-14US/100 |
| 5 mA |
30 mA |
300 mA |
| 10 mA |
100 mA |
1 A |
| 30 mA |
300 mA |
3 A |
| 100 mA |
1 A |
10 A |
| 300 mA |
3 A |
30 A |
| 1 A |
10 A |
100 A |
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Reset of alarm
The alarm can be acknowledged manually by Reset push-button, when the fault current is
below the treshold value. If automatic reset is needed, use the model VR-15. Not in use in USA models. |
Alarm time delay setting |
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The time delay is set by potentiometer t/s (2).
The set value is shown on the display
The set value d 0.20 is 0.2 second.
The alarm delay settings are:
| Model VR-14/1 |
0.2, 0.5, 1, 3, 5
and 10 seconds |
| Model VR-14/10 |
0.1, 0.5, 1, 3, 5
and 10 seconds |
| Model VR-14/100 |
0.1, 0.5, 1, 3, 5
and 10 seconds |
| Model VR-14US/10UL |
0.2, 0.5, 1, 3, 5
and 10 seconds |
| Model VR-14US/100UL |
0.2, 0.5, 1, 3, 5
and 10 seconds |
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Self testing
The Superintend VR-14 continuously monitors the condition of the entire measuring system and its own operation condition. If one part of the system is damaged, an alarm is generated. If, for example, the signal cable coming from the sum current transformer is loosened or open, the VR-14 generates an equipment alarm. Blinking “F”-letter. The relay has also tripped.
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The alarm is shown on the display.
Blinking red LED light and the “F”-letter. |
Connections of Superintend VR-14
VR-14/10 and VR-14/100 |
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When the monitoring unit is energized (on) both relay J2 & J3 contacts 1-2 are closed. When the relay is in standby position and an alarm or power failure occurs both relay J2 & J3 contacts 1 – 3 are closed. Shown on picture.
Operating voltage is connected to terminal J4.
The measuring standard cable (VMP) from sum current transformer must be connected to terminal J10.
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VR-14/1 |
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Sum Current Transformer is inside of monitoring unit. Inner diameter of transformer is 5/8" (16 mm) |
Examples of VR-14 unit connections
Monitoring electrical system |
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In this application the VR-14 is a monitoring unit for a Grounded Electrical System.
The unit generates an alarm if, for example:
- a wiring error occurs in the Electrical System,
- the insulation level drops below the set level,
- somebody connect a device with ground fault in to the Electrical System.
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| Ground fault Sensing and Relaying equipment (GFR) for UL-1053 use (NEC 230-95) |
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Current sensor VMI(K)-xxUL
Measuring Cable VMP-xxUL
GFR sensing unit VR-14US/10UL
or VR-14US/100UL
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Current sensors
VR-14US/10UL monitoring and relaying unit
Current sensors (Summing Current Transformers)
Closed
model
type |
Inner
diameter
inch (mm) |
Split
model
type |
Inner
diameter
inch (mm) |
Smallest
treshold
value |
| VMI-25UL |
1" (25) |
VMI-K25UL |
0,91" (23) |
30mA |
| VMI-35UL |
1,5" (38) |
VMIK-35UL |
1,38" (35) |
30mA |
| VMI-60UL |
2,44" (62) |
VMIK-60UL |
2,36" (60) |
30mA |
| VMI-95UL |
3,81" (97) |
VMIK-95UL |
3,74" (95) |
300mA |
| VMI-130UL |
5,27" (133) |
VMIK-130UL |
5,12" (130) |
300mA |
| VMI-200UL |
7,87" (200) |
VMIK-200UL |
7,8" (198) |
300mA |
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| VMIC-4x8UL |
4x8" (102x204) |
VMICK-4x8UL |
4x8" (102x204) |
3A |
| VMIC-4x14UL |
4x14" (102x356) |
VMICK-4x14UL |
4x14" (102x356) |
3A |
| VMIC-8x8UL |
8x8" (204x204) |
VMICK-8x8UL |
8x8" (204x204) |
3A |
| VMIC-8x14UL |
8x14" (204x356) |
VMICK-8x14UL |
8x14" (204x356) |
3A |
| VMIC-8x20UL |
8x20" (204x508) |
VMICK-8x20UL |
8x20" (204x508) |
3A |
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Shut trip with a transfer switch |
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GFR for DC supply voltages
VR-14US/10ULDC or
VR-14US/100ULDC |
Installation of Measuring Cable
The monitoring unit requires a measuring cable VMP-xx. Connect this cable to terminal J10 of the monitoring unit. The standard cables have plugs on each end and it is easy to connect without tools or risk of incorrect connection.
The cable is available in lengths: 2 ft, 6 ft, 16 ft and 32 ft ( 1, 2, 5, and 10m).
For USA models max length is 16 ft.
The smallest sum current transformer VMI(K)-25 is supplied with a fixed measuring cable. The standard length is 2 ft (1m). Also available by special order are cable lengths of 6 ft, 16 ft and 32 ft (2, 5, and 10m).
For USA models only 2 ft is available.
Specifications
VR-14 superintend monitoring system.
Supply voltage
Power burden
Operating temperature
Storage temperature
Humidity
Connections:
Dimensions
Weight |
USA 110 to 120V 60Hz
Other countries 220-240V 50Hz
DC 24V
2.5VA
+3...122°F ( 0...50°C)
-4...158°F ( -20...70°C)
95%, non condensing
Power and the alarm relay AWG 16 (1,5 mm) screw terminals
Sum current transformer 4-pin modular connector
see next page
0,49 lb (220 g) |
Alarm Relay
Relay contacts
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two separate spdt (single pole douple throw) dry contacts
240V AC or 24V DC Imax 5A/Vmax |
Measuring characteristics
Measuring channel
Measuring range
Model VR-14/1
Model VR-14/10
Model VR-14/100
Model VR-14US/10UL
Model VR-14US/100UL
Accuracy with
Sum Current Transformer
VMI-models, closed core
VMIK-models, Split core
VMIC(K)-models t
Repeatability
Alarm tripping current values
Model VR-14/1
Model VR-14/10
Model VR-14/100
Accuracy of tripping value
Alarm time delay settings
Model VR-14/1
Model VR-14/10
Model VR-14/100
Model VR-14US/10UL
Model VR-14US/100UL |
1
1mA-1A
10mA-10A
100mA-100A
30mA-10A
100mA-100A
+-5% +-2dgt
+-10% +-2 dgt
+-20% +-2dg
+-5%
5mA, 10mA, 30mA, 100mA, 300mA and 1A
30mA, 100mA, 300mA, 1A, 3A, and 10A
300mA, 1A, 3A, 10A, 30A, 100A
+-5% +-2 dgt
0.2, 0.5, 1, 3, 5 and 10 seconds
0.1, 0.5, 1, 3, 5 and 10 seconds
0.1, 0.5, 1, 3, 5 and 10 seconds
0.2, 0.5, 1, 3, 5 and 10 seconds
0.2, 0.5, 1, 3, 5 and 10 seconds |
Current transformer
thermal limiting current Ith/t
dynamic limiting current Idyn
continuous thermal limiting current
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105kA/s
254kA
100A |
VR-14 and VR-15 Monitoring Unit dimensions
VR-14/10, VR-15/10, VR-14/100 and VR-15/100 Monitoring Units |
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Flush Mounting Kit |
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VR-14/1 and VR-15/1 Monitoring Units |
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