NUMERIC 1-20 kVA Voltsafe Plus Installation Guide

: August 22, 2024
: NUMERIC

Table of Contents

NUMERIC 1-20 kVA Voltsafe Plus
Product Information
Product Usage Instructions
Introduction
Important safety instructions
Installation
Specifications
Read User Manual Online (PDF format)
Download This Manual (PDF format)

NUMERIC 1-20 kVA Voltsafe Plus

Product Information

Specifications

Capacity (kVA)	1, 2, 3, 5, 7.5, 10, 15, 20
Operation	Automatic
Cooling	Natural / Forced air

Product Usage Instructions

Installation
Follow these steps to install the VoltSafe Plus servo stabilizer:

Ensure installation is done in accordance with local electrical codes.
Connect the unit to the mains power supply following the installation procedure provided.

Operation
Here are the basic operations of the VoltSafe Plus:

Use the front panel operations and LED indications to monitor input and output parameters.
Ensure to connect only neutral to phase during operation.

Frequently Asked Questions (FAQ)

Q: Can I install the stabilizer in a location with flammable materials?
A: To prevent any potential hazards, do not install the stabilizer in compartments containing batteries or flammable materials.
Q: How do I know if the stabilizer is operating within safe parameters?
A: Use the LED indications on the front panel to monitor the stabilizer’s status. Normal and high indicators are provided for input and output sides.

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 centers 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 line of AC power system. This stabilizer is an electronic equipment which gives a constant output voltage from fluctuating input AC voltage and varying load conditions. VOLTSAFE PLUS produces a constant output voltage with ±2% accuracy of the set voltage.

Features

Seven segment digital display
Advanced MCU-based technology
High efficiency and reliability
Generator compatible
In-built SMPS technology
No waveform distortion
Overload cut-off
Power loss less than 4%
Continuous duty cycle
Provides audible buzzer warning for faulty / trip conditions
Visual LED indication for trip indications & mains ON
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 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. The stabilized voltage is supplied for the AC loads only.

Block diagram
VOLTSAFE PLUS – Servo 1 Phase – 1 Phase : Servo Stabilizer block diagram.

Front panel operations & LED indication

Dos and Don’ts – Operations

Dos
- For all single phase servo stabilizers, it is
- recommended to only connect the neutral and any one phase only.
- Ensure that there is no loose connection.
Don’ts
- Input line & Output line should not be interchanged in single phase connection.
- At the site, do no connect phase to phase at input side of the servo, under any circumstance. Only neutral to phase is to be connected.

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 it in compartments containing batteries or flammable materials or at 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.

IMPORTANT SAFETY WARNING

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 servo stabilizer has got moving parts like variac arm and motor, please keep it in a dust-free environment.

Installation

Installation procedure

Unpack the unit carefully without damage since the packaging of the equipment has a carton along with a foam-packed enclosure, depending on the case. It is recommended to move the packed equipment till the installation area and unpack it later.
The unit must be placed at an adequate distance from the wall and proper ventilation needs to be ensured for continuous operation. The unit should be installed in a dust-free environment and at a place where no heat waves are generated.
If the servo unit has a 3-pin power input cable, connect it to a 3-pin [E, N & P] Indian plug or a 16A Indian socket to the 1-pole main breaker switch, in accordance with local electrical codes and standards.
In other models, where the servo has a connector or terminal board, connect the marked input and output respectively from the terminal board.
Note: Do not interchange the single phase Input – L & N.
Switch ON Main MCB
Note: Input & Output MCB is an optional accessory as per the customer’s requirement for Air-cooled – single-phase servo stabilizers.
Before connecting the load, check the output voltage in the display meter provided in the front panel.
It should be within the desired set voltage of ± 2%. Verify the output voltage displayed on the digital meter in the front panel. Ensure the servo stabilizer is working properly.
Switch OFF Main MCB before connecting the load.
Connect the single-phase output to one end of the output-rated electrical cable from the load, in accordance with local electrical codes and standards. Connect the other end of the electrical cable to the output Indian UNI socket or terminal block marked ‘OUTPUT’.

AC safety grounding
Earth wire should be connected with the chassis earth point terminal of the unit.

WARNING! Make sure all the AC connections are tight (torque of 9-10ft-lbs 11.7–13 Nm). Loose connections could result in overheating and a potential hazard.

Specifications

Capacity (kVA)	1	2	3	5	7.5	10	15	20

BYPASS Switch – Optional
Note: Product specifications are subject to change purely on company’s discretion without any prior notice.

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

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 9668
Pune
Pinacle 664 park avenue, 8th floor,
Plot no 102+103, CTS No. 66/4,
Final, 4, Law College Rd, Erandwane,
Pune, Maharashtra – 411 004.
Phone: +91 98225 36680
Bengaluru
No-58, First Floor, Firoze White Manor, Bowring Hospital Road,
Shivajinagar, Bangalore -560 001.
Phone: +91 80 6822 0000
Coimbatore
No. B-15, Thirumalai Towers, No. 723,
1st Floor, Avinashi Road, Coimbatore – 641 018.
Phone: +91 422 420 4018
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
Kochi
Door No. 50/1107A9, JB Manjooran Estate, 3rd Floor, Bypass Junction,
Edappally, Kochi – 682 024.
Phone: +91 484 6604 710
Madurai
12/2, DSP Nagar,
Dinamalar Avenue,
Madurai – 625 016.
Phone: +91 452 260 4555