OVER CURRENT & EARTH FAULT RELAY- TYPE VN100R
Features
Simple and reliable construction
Micro-processor based numerical design
User friendly
Compact panel mounting case
Application
Time - current graded over current and earth fault protection of distribution systems
Back-up protection for generators, transformers,transmission lines etc.
Protection Functions
Sl.No Function Symbol ANSI Code
Three -phase over current protection
1 I> 51
Low-set stage (IDMT or DT)
2 Three -phase over current protection
I >> 50
High-set stage (DT)
3 Earth fault protection Io > 51N
Low-set stage (IDMT or DT)
Earth fault protection Io >> 50N
4
High-set stage (DT)
Type Tests
The relay has been type tested successfully at Central Power Research Institute (CPRI) Bangalore, as per the
requirements of IEC 60255, for electrical performance.
The relay has also been type tested successfully at Electronic Test and Development Centre (ETDC), Chennai
and Bangalore, for Disturbance Withstand, Mechanical Environment and Atmospheric Environment,
as per the requirements of relevant IEC and other international specifications.
Description
Type VN100R relay is basically a micro-processor based numerical protection relay, designed primarily
for over current and earth fault protection, using the well accepted time - current grading principle.
It is a versatile and simple relay offering different inverse time- current and definite time-current
characteristics, which are selectable at site as per the requirements.
The relay uses a single processor which is programmed to give different characteristics for over
current and earth fault protection.
The auxiliary power supply unit is designed for a wide range of DC and AC voltages.
The relay can be used with 1 amp or 5 amp secondary current transformers, and the rated current
is selectable on the relay.
The relay has a LCD screen on which the relay settings, pre-fault current etc.. are indicated.
The settings and selection of characteristic curves are carried out by a soft touch keypad
( MMC- Man Machine Communication) provided on the front panel of the relay .
Operation indication is by means of super bright LEDs, which are reset by means of a push button
provided on the front panel of the relay.
The relay is designed to have an in-built continuous supervision feature, and any internal fault in
the relay circuits is indicated by means of a ‘Relay Faulty’ LED on the front panel of the relay. Two
terminals are also available on the relay for connecting to a remote ‘Relay Faulty’ alarm.
Sufficient number of normally open and change - over contacts are provided for tripping and alarm
functions. The contacts have good ‘make’ and ‘break’ current ratings.
The relay is provided with one Binary input and one Binary output.These can be used for
applications such as ‘post closing trip circuit supervision’.
The relay is mounted in a compact, non-drawout type case,suitable for flush or projection
mounting on panels
Technical Data
1. Relay Rating
Rated current ( In ) : 1 / 5 A AC
Rated auxiliary voltage : 30 - 120 V AC / DC
: 80 - 250 V AC / DC
2. Setting Ranges
I - Over Current Elements
I > Set-Phase OC ( IDT ) - Low Set : 0.10 - 3.20 x In, in steps of 0.01
I > Curve-Operating Characteristics : NI ( Normal Inverse - 3.0 s & 1.3 s )
: VI ( Very Inverse )
: EI ( Extremely Inverse )
: LTI ( Long Time Inverse )
: DT ( Definite Time - 0 to 20.0 s )
t > Time Multiplier Setting - Low set : 0.05 - 2.00 in steps of 0.01
t > Definite Time - Low set : 0.10 - 20.0 sec. in steps of 0.10 sec.
I >> Set - OC - High set : 0.5 - 40.0 x In, in steps of 0.01
t >> Definite Time - High set : 0.05 - 2.00 sec. in steps of 0.01 sec.
II - Earth Fault Element
Io > Set - E/F ( IDT ) - Low Set : 0.10 - 1.00 x In, in steps of 0.01
Io > Curve - Operating Characteristics : NI ( Normal Inverse - 3.0 s & 1.3 s )
: VI ( Very Inverse )
: EI ( Extremely Inverse )
: LTI ( Long Time Inverse )
: DT ( Definite Time )
to > Time Multiplier Setting - Low set : 0.05 - 2.00 in steps of 0.01
to > Definite Time : 0.10 - 20.0 sec. in steps of 0.10 sec.
Io >> Set - E/F High set : 0.50 - 20.0 x In, in steps of 0.01
to >> Definite Time - E/F High set : 0.05 - 2.00 sec. in steps of 0.01 sec.
3. Reset Time of Inverse Time Elements : Less than 100 ms
4. Overshoot time : Less than 100 ms
5. Rated Burden
Current circuit : 0.05 VA for 1A
: 1.00 VA for 5A
Auxiliary voltage circuit : 15W maximum
6. Contacts : 2 pairs normally open and
3 change - over, self reset ,output
contacts are provided.
: one Binary input and one Binary
output
: one contact for ‘Relay Faulty’
alarm
7. Contact Ratings
AC DC
Make and 1250VA with 1250W with
carry maxima maxima
continuously of 5A and 300V of 5A and 300V
Make and
carry 7500VA with 7500W with
for 3.0 maxima maxima
seconds of 30A and 300V of 30A and 300V
100W (resistive) or
Break 1250VA with 50W (inductive-
maxima L/R=0.04s) with
of 5A and 300V maxima of 5A and 300V
8. Operation Indicator
Eight super bright LEDs, hand reset, are provided to indicate various relay operations
and
. phases involved in the faults. These LEDs are reset by means of a push button on
the relay front plate
9. Durability
Loaded contact - 10,000 operations minimum
Unloaded contact - 100,000 operations minimum
10. High Voltage Withstand
Dielectric Withstand : IEC 60255 - 5 : 1977
2 kV rms for 1 minute between all terminals and case earth
2 kV rms for 1 minute between terminals of independent circuits with terminals
on each independent circuit connected together.
1 kV rms for 1 minute across normally open contacts ( ANSI/IEEE C37.90.1989 )
Impulse withstand : 5KV, 1.2/50µs, 0.5J ( IEC 60255 - 5 )
Insulation Resistance : > 100MΩ AT 500V DC ( IEC 60255 - 5 )
11.Disturbance Withstand
: High-frequency ( 1MHz )
Disturbance test according
to IEC 255 - 22 - 1,class III
- Common Mode 2.5 kV
- Differential Mode 1.0 kV
Fast transients according to
IEC 255 - 22 - 4, class III and
IEC 801 - 4, level 4
- Power Supply inputs 4 kV, 5 / 50 ns
- Other inputs 2 kV, 5 / 50 ns
- Electrostatic discharge test
according to IEC 255 - 22 - 2
and IEC 801 - 2, class III
- air discharge 8 kV
- contact discharge 6 kV
12.Mechanical Environment
Vibration IEC 60255 - 21 - 1:1988
Response Class 2
Endurance Class 2
Seismic IEC 60255 - 21 - 3 : 1993
Class 2.0
Shock/bump test IEC 255 - 21 - 2, 20G,1000 bumps/dir
13.Atmospheric Environment
Temperature : IEC 60255 - 1
Storage and transit - 20 C to +70 C
Operating - 10 C to +55 C
Humidity Upto 95% RH and + 40 C
Enclosure Protection : IEC 60529:1989
IP 50 ( dust protected )
14.CASE
The relay is mounted in size 3, non - drawout case having 40 terminals and
dimensions 155 x 98.5 x 185 mm ( H x W x D ), suitable for flush or projection mounting.
The panel cut - out dimensions are 155 X 98.5 mm ( H x W )
15.Information required with order
Auxiliary voltage rating : 30 - 120V AC / DC or
: 80 - 250V AC / DC
Publication No : VRP - 100 (A)
VOLTECH MANUFACTURING COMPANY LTD
Marketing office Factory
VOLTECH ECO TOWER VOLTECH TECHNO- PARK
No: 2/429, Mount Poonamalle Road, 132,133,134 Sri Kumaran Nagar,
Ayyappanthangal, Kundrathur Main Road,
Chennai - 600 056. Kovur, Chennai - 600 122.
Ph :+91 44 43978000
Phone : 91-44-64586126
Fax :+91 44 42867746
Email : relay@voltechgroup.com Email : prasad.kr@voltechgroup.com
