CLASS 5826

REACTIVAR™ Electronic Sag Protector

The Electronic Sag Protector from

Square D is a breakthrough in power
line conditioning technology.

■ Compensates for 92% of all Power Quality

Events as defined by EPRI Distribution Power
Quality Study (1996)
■ OEM product integration to meet SEMI Standard
F47
■ Smaller, cost competitive alternative to UPS
■ Less than 1/4 cycle response time
■ 99% electrical efficiency
■ Built in three stage surge suppression circuitry
■ Available from 1.5 kVA, 120V single phase to
2000 kVA, 480V three phase
■ Compensates for two second cumulative 50%
voltage sag or three cycle outage per minute
(standard). Twelve cycle outage voltage hold up
(optional).

The Electronic Sag Protector (ESP) approaches the power line conditioning problem
from a unique perspective. For correction of most voltage sags, the missing voltage is
developed using energy from the utility line itself. For deep sags, below 50% of
nominal voltage, capacitive energy storage is used. The result is a high performance
solution, at low cost as it features:

■ Single stage power conversion modules

■ Minimal onboard stored energy (battery-free)
■ Transformer-free design (except high-power ESP-C models and 3W models)

Product performance has been extensively tested at industry and utility laboratories.
Standard ESP models are cUL listed. The ESP is available in three size ranges:

■ Single phase up to 100 kVA (ESP–A)

■ Three phase up to 300 kVA (ESP–B)
■ Three phase up to 2000 kVA (ESP–C)
Problem

Voltage sags are inevitable due to the physical nature of

the utility grid. Most voltage sags are the result of faults
occurring in the utility network. Sources of faults include:
animal or tree branch contact with power lines, inclement
weather and vehicle collisions with utility poles. The three
types of faults are: single-line-to-ground, line-to-line, and,
rarely, a three-phase to ground fault. Aside from faults,
voltage sags are created by large in-rush currents asso-
ciated with the cycling of large loads. Voltage sags are,
in fact, the most frequent power quality variation.

The sag magnitude and duration depend on the distance

to the fault and the utility’s circuit protection devices.
Customers near the fault will experience a deep voltage
sag followed by a complete interruption when the utility
circuit breaker or fuse operates. More distant customers
will be isolated from the fault by several transformers.
The impedances of these transformers decreases the
depth of the voltage sag. Until recently, the frequency
and impact of voltage sags in North America was not
well characterized.

In the largest power quality study ever done, the Electric Figure 1
Power Research Institute (EPRI) found that sags to 50%
of nominal and momentary outages represented over
92% of all power quality events. According to figure 1,
the EPRI Distribution Power Quality Study found that
a sag to 80% of nominal lasting up to 10 cycles was
Duration of Voltage Sag in Seconds
most common. The increased dependence of modern 0.05 0.1 0.2 0.5 1.0
manufacturing facilities on sensitive electronic equipment
has led to an increase in problems resulting from voltage 100
sags.
90
Percent of Equipment Nominal Voltage

80 SEMI F47
Sensitive electronic devices, such as variable speed
drives (VSDs) and programmable logic controllers 70
(PLCs), are prone to shut down when a voltage sag
occurs. Depending on the process, this shut down may 60
cause substantial losses from equipment downtime and
50 STANDARD ESP
creation of scrap material. Recognizing the severity of
the problem has led the microelectronics industry to 40 EXTENDED ESP
implement a new standard, SEMI F47 "Provisional
Specification for Semiconductor Processing Equipment 30
Voltage Sag Immunity" (figure 2). However, the
20
microelectronics industry is not the only industry where
voltage sags can cause significant problems. Other 10
industries utilizing both batch and continuous processes
with high sensitivity to voltage sags include: 0

■ Pulp & Paper Figure 2

■ Steel Processing Voltage Hold Up Curve from SEMI F47 with ESP
■ Plastics Performance Curves Superimposed
■ Food & Beverage
Note: Equipment must continue to operate without
■ Pharmaceutical interrupt during voltage sags above the red line.
■ Automotive
Reproduced from SEMI® F47-0200 with permission from
■ Petrochemical
Semiconductor Equipment and Materials International.
SEMI Standards are subject to revision at any time. For
information on or to obtain the most up-to-date version of
this standard please visit SEMI Online at
http://www.semi.org
 Solution

The Electronic Sag Protector is suitable for installation in wide-ranging applications.

Static Switch
Installed in series with process equipment, the ESP provides sag and short duration
outage voltage hold up. Outage voltage hold up can be increased with additional
capacitive energy storage. The ESP can be installed either on a spot basis – to protect
Regulator
& Storage Module a particular load or circuit – or on a global basis – to protect an entire distribution
Load
panel, motor control center or even an entire substation or facility.
Unprotected Protected
Input Output
Principle of Operation
Figure 3
ESP-A or ESP-B Block Diagram Converter and Filter
■ Converter uses solid state components to convert the incoming line voltage to a
Pulse Width Modulated (PWM) waveform
■ Output of the converter is filtered to produce the missing voltage which is added to
the incoming voltage "filling in" the sag and reproducing the original voltage
waveform
500
INPUT Voltage (V)

■ For deeper sags and momentary outages, the converter supports the load using
400
300
200
100
0 the stored energy
- 100
- 200
- 300
- 400
- 500
500
Static Bypass Switch
OUTPUT Voltage (V)

400
300
200
■ Under normal conditions, the bypass switch is closed and passes utility voltage to
100
0 the load
- 100
- 200
- 300
- 400
■ During a sag, the inverter is energized and bypass gating is removed inserting the
- 500
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 PWM converter in series with the utility and the load in less than 1/4 cycle
time (s)
■ After the sag, converter is turned off and bypass is re-closed
Figure 4
Performance of Extended Voltage Hold Up Energy Storage
ESP model with 12 cycles, 50% sag ■ Electrolytic capacitors store energy required for sags below 50% of nominal voltage
■ Outage hold-up time can be increased up to 12 cycles

Microprocessor Control
500 ■ Engages sag support circuitry when appropriate
INPUT Voltage (V)

400

■ Operates the bypass switch to insert the converter and filter in series with the load
300
200
100

- 100
0
during a sag
- 200
- 300
- 400 ■ Synchronizes to the utility and regulates the output voltage by controlling the
- 500
500
converter voltage added to the incoming line voltage
OUTPUT Voltage (V)

400
300
200
100

- 100
0
Features:
- 200

■ Transformer-free series voltage injection device (except ESP-C) to reduce cost,

- 300
- 400
- 500
0 0.05 0.1

time (s)
0.15 0.2
volume and weight of power line interface
■ Utilizes voltage remaining and "boosts" to pre-sag value
Figure 5 ■ No batteries or mechanical storage required
ESP performance with ■ Includes three stage surge suppression circuitry to continuously protect the applied
3 Cycle Outage load
■ Optional hard wired bypass (manual or automatic) for maintenance purposes
■ Three phase units for 3 wire or 4 wire networks

Static
Switch

Regulator &
Storage Module Load

Unprotected Protected
Input Output

Figure 6
ESP-C Block Diagram
Product Selection

ESP-A Specifications ✽ ESP-A Applications

■ Nominal Input Voltage: 120V, 240V or 277V 1 Phase ■ Single phase 120V up to 43 kVA, 240V up to 86
■ Input Sag: kVA, 227V up to 100kVA

● -13% to -50% for up to 2 seconds ■ Industrial & Commercial OEMs for embedded
cumulative per minute (standard) voltage sag compensation
● -50% to -100% sags for 1-3 cycles (standard) ■ Sensitive equipment for manufacturing plants
● 24 cycle voltage hold up for 120V (optional) ■ Distribution panels for HID lighting
● 12 cycle voltage hold up for 240V (optional)
■ Distribution panels or racks for computer and
■ Output Voltage during sag: +5% to -10% of nominal telecomm equipment
■ Response Time: within 1/4 cycle ■ Retrofit into sensitive equipment for controls and
■ Power Rating: PLC back-up
● 1.5 to 43 kVA at 120V single phase ■ Distribution panels for offices, shops, small
● 6.0 to 86 kVA at 240V single phase business and homes
● 7.0 to 100 kVA at 277V single phase ■ Sensitive office equipment

ESP-B Specifications ✽ ESP-B Applications

■ Nominal Input Voltage: 208, 240 or 480V 3 phase, ■ 3 Phase, 208V up to 130 kVA, 240V up to 150
4 wire standard (3 wire optional) kVA, 480V up to 300
■ Input Sag: ■ Adjustable speed drives
● -13% to -50% for symmetrical sags and line to ■ Robotics and positioning controllers
line or line to ground sags for up to 2 seconds ■ Industrial & Commercial OEMs for embedded
cumulative per minute (standard) voltage sag compensation
● -50% to -100% sags for 1-3 cycles (standard)
■ Sensitive equipment for manufacturing plants
● Incoming single line to ground fault voltage hold
up for 12 cycles (standard) ■ Distribution panels or racks for computer and
● Up to 12 cycles voltage hold up on power loss telecomm equipment
(optional) ■ Distribution panels for HID lighting
■ Output Voltage during sag: +5% to -10% of
nominal
■ Response Time: within 1/4 cycle
■ Power Rating:
● 9 to 130 kVA at 208V three phase
● 10 to 150 kVA at 240V three phase
● 21 to 300 kVA at 480V three phase (future
rating up to 500 kVA)
ESP-B Product Offering ◆
Details Voltage Catalog Dimensions✖ Weight ✖
ESP-A Product Offering ◆ Hold Up Number (H"xW"xD") (lbs)

Details Voltage Catalog Dimensions✖ Weight ✖ 9kVA, 208V, 3PH 4W Standard ESP0090F7S 30x24x13 115
Hold Up Number (H"xW"xD") (lbs) 9kVA, 208V, 3PH 4W Extended ESP0090F7E 36x38x13 165
1.5kVA, 120V, 1PH 2W Extended ESP0015G3E 20x12x3.5 16 18kVA, 208V, 3PH 4W Standard ESP0180F7S 36x38x13 186
3kVA, 120V, 1PH 2W Standard ESP0030G3S 20x12x3.5 20 18kVA, 208V, 3PH 4W Extended ESP0180F7E 48x36x16 256
3kVA, 120V, 1PH 2W Extended ESP0030G3E 20x19x3.5 33 10kVA, 240V, 3PH 3W Standard ESP0100E6S 30x24x13 160
6kVA, 120V, 1PH 2W Standard ESP0060G3S 20x19x3.5 31 10kVA, 240V, 3PH 3W Extended ESP0100E6E 30x24x13 210
6kVA, 120V, 1PH 2W Extended ESP0060G3E 36x20x8 45 21kVA, 480V, 3PH 4W Standard ESP0210B7S 30x24x13 115
6kVA, 240V, 1PH 3W Standard ESP0060E4S 20x24x4 40 21kVA, 480V, 3PH 3W Standard ESP0210B6S 30x24x13 160
6kVA, 240V, 1PH 3W Extended ESP0060E4E 20x38x4 65 21kVA, 480V, 3PH 4W Extended ESP0210B7E 48x36x13 165
12kVA, 240V, 1PH 3W Standard ESP0120E4S 20x38x4 65 21kVA, 480V, 3PH 3W Extended ESP0210B6E 48x36x13 210
7kVA, 277V, 1PH 2W Standard ESP0070D3S 20x12x3.5 20 42kVA, 480V, 3PH 4W Standard ESP0420B7S 36x38x13 186
7kVA, 277V, 1PH 2W Extended ESP0070D3E 20x19x3.5 33 42kVA, 480V, 3PH 3W Standard ESP0420B6S 36x38x13 266
14kVA, 277V, 1PH 2W Standard ESP0140D3S 20x19x3.5 31 42kVA, 480V, 3PH 4W Extended ESP0420B7E 48x36x16 256
14kVA, 277V, 1PH 2W Extended ESP0140D3E 36x20x8 45 42kVA, 480V, 3PH 3W Extended ESP0420B6E 48x36x16 336

✽ Specifications subject to change without notice.

◆ Larger units available. Contact PQC Marketing.
✖ Dimensions and weights are approximate. Do not use for construction.
 Product Selection

ESP-C Specifications ✽ ESP-C Applications

■ Custom Built ■ 3 Phase, 480V from 500 kVA up to 2000 kVA
■ Nominal Input Voltage: 480V +/-8%, 3 phase, 3 ■ Semiconductor manufacturing
wire or 4 wire equipment and plants
■ Input Sag: ■ Plastics extrusion
● -13% to -50% for symmetrical sags and line to ■ Automobile manufacturing
line or line to ground sags for up to 2 seconds ■ Textile spinning and weaving
cumulative per minute (standard)
■ Chemical processing
● -35% to -80% single line to ground or line to
line sags for 2 seconds cumulative per minute ■ Steel and paper mills
● -50% to -100% sags for 1-3 cycles (standard) ■ Petroleum refining
● 12 cycle outage voltage hold up (optional)
■ Output Voltage during sag: +5% to -10% of
nominal (true RMS)
■ Response Time: within 1/4 cycle
■ Power Rating: from 500 kVA up to 2000 kVA
at 480V

Typical Installation Points

■ ESP models available from 120V single phase to
480V three phase for sensitive loads

208 or 480 V
Three Phase

Main ESP-B Load

Breaker

Utility
ESP-C
Load

480 V Load
Substation Three Phase
Transformer Up to 2000 kVA 120, 240 277 V
Single Phase

Load
ESP-A

Comparison with Existing Solutions

Type of Event % of Total Voltage ELECTRONIC SAG UPS Systems
PQ Events Regulator (CVT) PROTECTOR

Spikes 5% Solves Solves Solves

The ESP reduces or eliminates problems
associated with 92% of all power quality events.
Sag to 80% 35% Solves Solves Solves To protect against long term outages, representing
Sags from 50% - 80% 45% No Solves Solves 4% of all events, a significant premium in both cost
and space is required with the installation of a
Outage 0-0.15 sec 7% No Solves Solves
UPS. Both initial cost and maintenance costs of a
Outage 0.15-500 sec 4% No No Solves UPS are much higher than a ESP. In addition an
ESP is significantly lighter and smaller than a
>500 sec Outage 4% No No Some
UPS.
% Events Solved 100% 40% 92% 96%

kVA Range 1-300 kVA 1-2000 kVA 0.2-1000 kVA

 Product Options

Other Reactivar ® products and services: Standard Features and Available Options
■ REACTIVAR LV Fixed Capacitors ESP-A ESP-B ESP-C

■ AV4000 and AV5000 LV standard automatic capacitor banks for power factor Manual or Automatic Bypass Switch ❍ ❍ ❍
correction of electrical networks with less than 15% non-linear loads Three cycle outage voltage hold up ❑ ❑ ❑
■ AV6000 LV Anti-resonant banks for power factor correction in harmonic rich Up to twelve cycle outage voltage hold up ❍ ❍ ❍
environments Continuous Duty Sag Correction ❍ ❍ ❍
■ AV7000 LV Harmonic filters for removal of harmonics ASA 61 Paint Finish ❑ ❑ ❑
■ AT5000 standard and AT6000 anti-resonant (detuned) LV Transient Free ❑ Standard Feature
Systems ❍ Available Option
■ AV9000 LV Real Time Systems for sag support and power factor correction of
highly cyclical loads
■ Active Filters ESP - A ByPass Options
■ Hybrid Filters with Active and Passive Elements Details Type Catalog Dimensions
■ Medium Voltage Fixed Capacitors Number (H"xW"xD")
1.5kVA, 120V, 1PH 2W Manual MBP0015G3M 26x20x6
■ Medium Voltage Metal Enclosed standard, anti-resonant and filter systems up
3kVA, 120V, 1PH 2W Manual MBP0030G3M 26x20x6
to 38 kV
6kVA, 120V, 1PH 2W Manual MBP0060G4M 26x20x6
■ Medium Voltage Real Time and Transient Free Systems up to 15 kV 6kVA, 240V, 1PH 3W Manual MBP0060E4M 26x20x6
■ Zero Threshold Surge Suppressor for global protection against utility 12kVA, 240V, 1PH 3W Manual MBP0120E4M 26x20x6
generated transients 7kVA, 277V, 1PH 2W Manual MBP0070D3M 26x20x6
14kVA, 277V, 1PH 2W Manual MBP0140D3M 26x20x6
■ Engineering Services Available
● Sizing and rating assistance
● Harmonic Analysis
● Computer simulations
ESP - B ByPass Options
● Commissioning
● Service contracts Details Type Catalog Dimensions
Number (H"xW"xD")
9kVA, 208V, 3PH 4W Manual MBP0090F7M 65x27x15
9kVA, 208V, 3PH 4W Automatic MBP0090F7A 65x27x15
18kVA, 208V, 3PH 4W Manual MBP0180F7M 65x27x15
18kVA, 208V, 3PH 4W Automatic MBP0180F7A 65x27x15
21kVA, 480V, 3PH 4W Manual MBP0210B7M 65x27x15
21kVA, 480V, 3PH 4W Automatic MBP0210B7A 65x27x15
21kVA, 480V, 3PH 3W Manual MBP0210B6M 65x27x15
21kVA, 480V, 3PH 3W Automatic MBP0210B6A 65x27x15
42kVA, 480V, 3PH 4W Manual MBP0420B7M 65x27x15
42kVA, 480V, 3PH 4W Automatic MBP0420B7A 65x27x15
42kVA, 480V, 3PH 3W Manual MBP0420B6M 65x27x15
42kVA, 480V, 3PH 3W Automatic MBP0420B6A 65x27x15

© 2000 Schneider Electric Canada, All Rights Reserved

ESP
Ground
Stud

L1 L2 L3 N N X 1 X 2 X 3

Consult your nearest Square D / Schneider Electric Utility Loads

office for pricing. L1 X1
Hot
L2 X2
Visit our Website at www.reactivar.com
L3 X3
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Schneider Electric
Power Quality Correction Group Head Office
255 Orenda Road 19 Waterman Avenue Wiring of 3P 4W ESP
Bramalea ON L6T 1E6 Toronto, ON M4V 1Y2
Tel: (905) 459-8805 www.schneider-electric.ca
Fax: (905) 454-3603 www.squared.com
Tel: (416) 752-8020
D5826BR0001EP R0 Fax: (416) 752-6230 April, 2000