NUMERIC 100 kVA Plus Voltsafe Air Cooled Instruction Manual

NUMERIC 100 kVA Plus Voltsafe Air Cooled

Product Usage Instructions

Installation Procedure

1. Ensure the stabilizer is placed in a well-ventilated area.
2. Connect the AC Input/Output earth wire to the ground point for the loads.
3. Maintain the oil level in the middle of the indicator for oil-cooled stabilizers.

Safety Grounding

1. Connect the earth wire to the chassis terminal of the unit securely.
2. Ensure proper grounding to prevent electrical hazards.

FAQ

• Q: What should I do if the stabilizer shows a fault message on the LCD?
• A: If a fault message is displayed, ensure all connections are secure and consult the user manual for troubleshooting steps.
• Q: Can the stabilizer be used in residential settings?
• A: The stabilizer is designed for industrial applications; consult the manufacturer for residential use.

PREFACE

Congratulations!

• We are delighted to welcome you to our family of customers. Thank you for choosing Numeric as your reliable power solution partner; you now have access to our widest network of 250+ service centres in the country.
• Since 1984, Numeric has been enabling its clients to optimize their businesses with top notch power solutions that promise seamless and clean power with controlled environmental footprints.
• We look forward to your continued patronage in the years to come!
• This manual provides general information regarding installation and operation of VOLTSAFE PLUS.

Disclaimer

• The contents of this manual are bound to change without prior notice.
• We have exercised reasonable care to give you an error-free manual. Numeric disclaims liability for any inaccuracies or omissions that may have occurred. If you find information in this manual that is incorrect, misleading, or incomplete, we would appreciate your comments and suggestions.
• Before you begin the installation of the servo voltage stabilizer, please read this manual thoroughly. The warranty of this product is null and void, if the product is abused/misused.

Introduction

• Numeric VOLTSAFE PLUS is a servo-controlled voltage stabilizer with advanced microprocessor-based technology to stabilize a line of AC power system.
• This stabilizer is an electronic equipment that gives a constant output voltage from fluctuating input AC voltage and varying load conditions. VOLTSAFE PLUS produces a constant output voltage with ±1% accuracy of the set voltage.

Features

• Alpha-numeric LCD metering for each phase
• Advanced MCU-based technology
• High efficiency and reliability
• Generator compatible
• No waveform distortion
• Correction speed – 50 V/sec
• Response time < 20 ms
• Immune to load PF and supply frequency variations
• Power loss less than 4%
• Continuous duty cycle
• Provides audible buzzer warning for faulty/trip conditions
• Enclosure Design – Prevents ingress of dust and foreign particles
• Oil Coolant – Transformer Insulation Oil EHV Grade – IS335
• Castor wheels provided for easy movement
• Eye bolts provided for ease of movement
• Extended life
• High MTBF with low maintenance

Principle of operation

VOLTSAFE PLUS uses a closed-loop feedback system to monitor the input and output voltages and to correct the varying input voltage. The constant output voltage is achieved by using a variable autotransformer (variac) with AC synchronous motor, buck-boost transformer, and an electronic circuit. Microcontroller-based electronic circuit senses the voltage, current and frequency and compares it with a reference. In case of any deviation in input, it generates a signal which energizes the motor to vary the voltage and correct the output voltage within the said tolerance, with the help of the buck-boost transformer.

Cooling system
ONAN – Oil Natural Air Natural Cooling system is used for 3 Phase Oil Cooled Stabilizers

Block diagram

• 3 Phase – 3 Phase
• Servo Stabilizer without Isolation Transformer
• 3 Phase – 3 Phase
• Servo Stabilizer with Isolation Transformer

Front panel operations

START

| Use for START switch Initial time delay release.

Trip release for output over-voltage, output under-voltage, input over-voltage and input under-voltage for each phase.

STOP| Use for STOP switch to break the Output.
LOG| Use for LOG switch to check the failure & Trip details.

Digital metering

Input voltage

(for each phase)

| Output voltage

(for each phase)

| Frequency

(for each phase)

| Load current

(for each phase)

Fault message display in LCD

Phase fail / Trip status indication| Input under-voltage / over-voltage| Output under-voltage / over-voltage| Output overload

Dos and Don’ts – Operations

Important safety instructions

General safety precautions

• Do not expose the stabilizer to rain, snow, spray, bilge or dust. To reduce the risk of hazard, do not cover or obstruct the ventilation openings. Do not install the stabilizer in a zero-clearance compartment which may result in overheating.
• To avoid the risk of fire and electronic shock, make sure that the existing wiring is in good condition and the wire is not under-sized. Do not operate the stabilizer with damaged wiring.
• This equipment contains electronic components which can produce arcs or sparks. To prevent fire or explosion, do not install in compartments containing batteries or flammable materials or in locations that require ignition-protected equipment. This includes any space containing gasoline-powered machinery, fuel tanks or joints, fittings, or other connections between components of the fuel system.
• As dangerous voltages are present within the servo-controlled voltage stabilizer, only Numeric technicians are permitted to open it. Failure to observe this could result in the risk of an electric shock and invalidation of any implied warranty.
• As the servo stabilizer has got moving parts like variac arms and motors, please keep it in a dust-free environment.

Installation

Installation procedure

• Unpack the unit carefully without damage since the packaging of the equipment has either a wooden pallet, cardboard or wooden packed enclosure depending on the case, it is recommended to move the equipment packed till the installation area and later unpack it.

• Unit must be placed at an adequate distance from the wall & proper ventilation is necessary for continuous operation. The unit should be housed in such a place where no heat waves are generated & in a dust-free environment.

• The oil level indicator provided at the oil tank indicates the filled oil level.

• Before filling the oil, check the tightness of the oil outlet and then fill the transformer coolant oil through the oil inlet pipe & then close the valve. Oil filling volume will differ based on the oil tank capacity.

• Oil level indicator provided in the oil tank can show the oil filling level in the oil tank & the oil filling has to be reached up to the mid position of the oil level indicator.
  Note: It is mandatory that the Mains AC line supplying the stabilizer includes input protection.

• Open the closing cover provided in the rear side. Connect the 3-phase supply to one end of the Input rated electrical cable from the 3 pole Main Breaker switch under local electrical code and standards.

• Connect the other end of the electrical cable to the terminal connector/SMC terminal in the front end marked ‘INPUT’.
  Note: Do not interchange the 3-phase input – R, Y, B & N.

• Switch ON Main MCB/MCCB
  Note: Input & Output MCB /MCCB as an optional accessory against customer requirement for oil-cooled 3-phase servo stabilizers.

• Check the output voltage in the display meter provided in the front panel. It should be within the desired set voltage of ±1%. Verify the output voltage displayed on the digital meter in the front panel. Ensure the servo stabilizer is working properly.

• Switch OFF the Main MCB/MCCB before connecting the load.

• Connect 3 phase output to one end of the Output rated electrical cable from the load under local electrical codes and standards. Connect the other end of the electrical cable to the output terminal connector/SMC terminal in the front panel marked ‘OUTPUT’.

• Keep the ROTARY/MANUAL change-over switch in ‘SERVO’ position,

Note: ROTARY/MANUAL change-over switch as an optional accessory against customer requirement for oil-cooled 3-phase servo stabilizers.
Note: For Oil cooled Servo stabilizers, Check the Oil level to be maintained in the middle of Oil level indicator.

AC safety grounding
The AC Input /Output earth wire should be connected to ground point for the loads and the other end should be connected to chassis terminal of the unit.

WARNING!
Ensure that all the AC connections are tight (torque to 9-10ft-lbs, 11.7 – 13 Nm).
Loose connections could result overheat in a potential hazard.

Specifications

GENERAL
Control| Digital (MCU-based design)
Drive| AC synchronous motor control
Operation| Automatic
Cooling| ONAN (Oil Natural Air Natural)
Ingress Protection| IP20
Insulation Resistance| > 5M at 500 VDCas per IS9815 Standard
Dielectric Test| 2kV RMS for 1 min
Ambient temperature| 0˚ to 45˚C
Application| Indoor use
Acoustic Noise level| ≤ 60 dB at 1-meter distance
Colour| Oil tank – light grey – RAL7035; Enclosure – jet black – RAL 9005
Standards| Conforms to IS9815
IP/OP – Cable Entry| Rear side
Generator Compatibility| Compatible
INPUT
Voltage Range*| Normal (340 VAC~ 480 VAC) / Wide (310 VAC ~ 480 VAC)
Frequency Range| 47 ~ 53 ± 0.5% Hz
Correction Speed| 50 V/sec (Ph-Ph)
OUTPUT
Voltage| 415 VAC
Waveform| True reproduction of input, no waveform distortion introduced by stabilizer
Efficiency| > 97%
Power factor| Immune to load PF

Protections

| Single-phase prevention and cut-off
Neutral failure
Frequency – Low/High cut-off
Phase failure
Surge arrester
Input : Low/High & Output: Low/High cut-off
Overload – Electronic trip
Short circuit -MCB/MCCB
Carbon brush failure & Oil level indicator
Phase reversal trip
PHYSICAL*
Dimensions (WxDxH) in mm (+/- 5 mm)| 1100 X 800 X 1450| 1400 X 800 X 1450| 1800 X 1050 X 1600
Weight (kgs)| 800| 825| 850| 875| 900| 950
Display type| 2 Line LCD

Display 9arameters

| Input voltage (Line-Line & Line-Neutral) each phase
Output voltage (Line-Line & Line-Neutral) each phase
Load current (Line-Neutral)
Output frequency
Events| Fault annunciation
Input / Output terminations| Terminal board provided

• Accuracy of dimension ± 2mm
• Note: Product specifications are subject to change purely at the company’s discretion without any prior notice
• Range can be customised to customer requirement, ** Input MCB/MCCB & manual bypass is optional

CONTACT

Head Office

• 10th Floor, Prestige Center Court,
• Office Block, Vijaya Forum Mall, 183,
• N.S.K Salai, Vadapalani,
• Chennai – 600 026.
• Phone: +91 44 4656 5555

Regional Offices
New Delhi

• B-225, Okhla Industrial Area,
• 4th Floor, Phase-1,
• New Delhi – 110 020.
• Phone: +91 11 2699 0028

Kolkata

• Bhakta Tower, Plot No. KB22,
• 2nd & 3rd Floor, Salt Lake City,
• Sector – III, Kolkata – 700 098.
• Phone: +91 33 4021 3535 / 3536

Mumbai

• C/203, Corporate Avenue, Atul Projects,
• Near Mirador Hotel, Chakala,
• Andheri Ghatkopar Link Road,
• Andheri (East), Mumbai – 400 099.
• Phone: +91 22 3385 6201

Chennai

• 10th Floor, Prestige Center Court,
• Office Block, Vijaya Forum Mall,
• 183, N.S.K Salai, Vadapalani,
• Chennai – 600 026.
• Phone : +91 44 3024 7236 / 200

Branch Offices
Chandigarh

• SCO 4, First Floor, Sector 16,
• Panchkula, Chandigarh – 134 109.
• Phone: +91 93160 06215

Dehradun

• Unit-1 and 2, Chakrata Road,
• Vijay Park Dehradun – 248001.
• Uttrakhand
• Phone: +91 135 661 6111

Jaipur

• Plot No. J-6, Scheme-12B,
• Sharma Colony, Bais Godown,
• Jaipur – 302 019.
• Phone: +91 141 221 9082

Lucknow

• 209/B, 2nd Floor, Cyber Heights,
• Vibhuti Khand, Gomti Nagar,
• Lucknow – 226 018.
• Phone : +91 93352 01364

Bhubaneswar

• N-2/72 Ground Floor, IRC Village,
• Nayapally, Bhubaneswar – 751 015.
• Phone: +91 674 255 0760

Guwahati

• House No 02,
• Rajgarh Girls High School Road
• (Behind Rajgarh Girls High School),
• Guwahati – 781 007.
• Phone : +91 361 245 0322/96000 87171

Patna

• 405, Fraser Road, Hemplaza,
• 4th Floor, Patna – 800 001.
• Phone : +91 612 220 0657

Ranchi

• 202 & 203, 2nd Floor, Sunrise Forum,
• Bardwan Compound, Lalpur, 2nd Floor,
• Ranchi – 834 001.
• Phone : + 91 98300 62078

Ahmedabad

• A-101/102, Mondeal Heights,
• Beside Hotel Novotel, Near Iscon Circle,
• S G Highway, Ahmedabad – 380 015.
• Phone : +91 79 6134 0555

Bhopal

• Plot No. 2, 221, 2nd Floor, Akansha Complex,
• Zone-1, M.P.Nagar, Bhopal– 462 011.
• Phone : +91 755 276 4202

Nagpur

• Plot. No.174, H.No.4181/C/174, 1st Floor,
• Loksewa Housing Society, Near Dr. Umathe
• & Mokhare College, Bhamti Road,
• Lokseva Nagar, Nagpur – 440 022.
• Phone : +91 712 228 6991 / 228 966

Hyderabad

• Prestige Phoenix Building,
• 1st Floor, Survey no. 199,
• No. 6-3-1219/J/101 & 102, Uma Nagar,
• Opposite to Begumpet Metro Station
• Begumpet 500016
• Phone: +91 40 4567 1717/2341 4398/2341 4367

EMAIL

• Sales – enquiry.numeric@numericups.com
• Service – support.numeric@numericups.com
• Contact us.: 0484-3103266 / 4723266
• www.numericups.com

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