EGP80 Electronic Grade Panelboard Technical Specifications

Technical Specifications

The electrical industry’s first Electronic Grade panelboard


The electrical industry’s first Electronic Grade panelboard, Current Technology’s patented and innovative EGP integrate Current Technology’s respected UL 1283 high frequency range power filter and UL 1449 high performance suppression system with your choice of UL 67 listed GE, Siemens, Square D or Cutler-Hammer/Westinghouse non-linear six-wire panelboards. Standard EGP features include:

UL 1449 High Performance Suppression System: Advanced seamless technology integrates arrays of matched non-linear voltage dependent metal oxide varistors for maximum performance and proven reliability. EGPs provide bi-directional, bi-polar power conditioning with a tested single-pulse surge current capacity in excess of 160,000 amps per phase and a repetitive 10,000 amp surge current capacity of 2,500 impulses to assure maximum protection of valuable assets.

UL 1283 High Frequency Extended Range Power Filter: Unique filtering techniques combine with tight voltage clamping to provide optimum protection. Bi-directional, bi-polar line control yields broad range sine wave filtering to remove low-level surges, sharp wavefronts and error-producing high frequency noise bursts.

Integral Breakers for Suppression/Filter System: Integral suppression/filter system and three pole circuit breaker provides increased safety and the most cost-effective means of installation to achieve optimum performance

200% Rated Copper Neutral Bus: A 200% rated copper neutral bus eliminates harmful neutral overheating proliferated by non-linear loads

Safety Ground Bus: Incorporating an Al/Cu-rated mechanical lug at input, the safety ground bus accommodates connections equal to the number of branch breaker positions

Insulated Isolated Ground Bus: The insulated isolated ground bus eliminates cross-interference between safety ground and the isolated ground associated with sensitive electronic equipment

Ten Mode Diagnostic Test Point: The industry’s first integral test point allows easy Diagnostic Test Set connection for real time testing and monitoring of system integrity using Current Technology’s exclusive DTS-2 Diagnostic Test Set

Main Lug/Main Breaker Configurations: General Electric, Siemens, Square D and Cutler-Hammer/Westinghouse main lug or main breaker panel configurations are available to meet the requirements of any distribution system

Customer-Specified Breaker Layout: Single, two- or three-pole breaker configuration in accordance with exact customer specifications

Status Indicators: Indicate suppression and overcurrent status

Suppression Filter Systems Interconnections: Made with #8 AWG copper hypalon conductor with compression lugs and bolted to low impedance corrosion-resistant, tin-plated bus to ensure lowest possible impedance

Warranty: Five Years, suppression filter assembly and panelboard including breakers


Standard description
UL 1449 Underwriters Laboratories standard that establishes requirements for surge suppression safety and performance. Commonly recognized as a benchmark test for product comparison
UL 1283 Underwriters Laboratories standard dictating requirements for electromagnetic interference (EMI) filters installed on, or connected to, 600V or lower potential circuits installed in accordance with the National Electrical Code. Also covers filters used to attenuate unwanted high frequency signals generated from electromagnetic sources
CUL Canadian version of Underwriters Laboratories
NEMA LS-1 The specification format guideline published by the National Electrical Manufacturers Association for specifiers and customers investigating Low Voltage Surge Protection Devices
UL 67 Underwriters Laboratories recognized standard for the manufacture of electric panelboards rated 600 volts or less. UL 67 also dictates the use of Low Voltage AC Power Switching Devices and Fused Power Circuit Devices in panelboards
CSA Canadian Standards Association’s guidelines for compliance with general Canadian Electrical Code requirements for bonding and ground/protective ground of electrical equipment and surge/transient voltage suppressors


EGP1 80-120/240-MLO-2/3 45 6 EGP1 80-120/208-MB-2/3 45 6
EGP1 80-120/240-MB-2/3 45 6 EGP1 80-277/480-MLO-2/3 45 6
EGP1 80-120/208-MLO-2/3 45 6 EGP1 80-277/480-MB-2/3 45 6

Insert G for General Electric, I for Siemens, S for Square D, or W for Cutler-Hammer/Westing-house; MB = main breaker or MLO = main lug only;
insert ampere rating (100, 125, 225, 400, 600);
insert 1 for single phase or 3 for three phase;
insert total number of branch circuit positions including spaces;
insert F for flush mount or S for surface mount and
insert T for top feed or B for bottom feed plus option suffix(es). Example: EGPG-120/240-MB-100/112-FT or EGPS-120/208-MLO-225/342-SB or EGPW-277/480-MB-400/384-ST-FCC.


Protection mode Single pulse surge current capacity per mode
Line-to-Neutral >80,000 amps
Line-to-Ground >80,000 amps
Neutral-to-Ground >80,000 amps
Line-to-Line >80,000 amps
Per Phase >80,000 amps

In compliance with NEMA LS 1-1992, paragraphs 2.2.7, 2.2.9 and 3.9, Current Technology suppression filter systems are single pulse surge current tested in all modes at currents up to 150% of the product design rating by an industry-recognized independent test laboratory. Single pulse surge current capacities of 200,000 amps or less are established by single-unit testing of all components within each mode. Due to present industry test equipment limitations, single pulse surge current capacities over 200,000 amps are established via testing of individual components or sub-assemblies within a mode.


Protection mode Minimum tested impulses per mode
Line-to-Neutral >3,500
Line-to-Ground >3,500
Neutral-to-Ground >3,500
Line-to-Line >3,500

Per ANSI/IEEE C62.41-1991 and ANSI/IEEE C62.45-1992, all Current Technology suppression filter systems are repetitive surge current capacity tested in every mode utilizing a 1.2 X 50m sec 20KV open circuit voltage, 8 X 20 m sec 10 KA short circuit current Category C3 bi-wave at one minute internals without suffering either performance degradation or more than 10% deviation of clamping voltage at a specified surge current.



Multiple unit installation Frequency Single unit installation
51 dB 100 KHz 34 dB
94 dB 1 MHz 51 dB
114 dB 10 MHz 54 dB
120 dB 100 MHz 48 dB

All Current Technology suppression filter systems EMI-RFI noise rejection or attenuation values are in compliance with test and evaluation procedures outlined in NEMA LS 1-1992, paragraphs 2.2.11 and 3.11.


Voltage MCOV
120V 150V
240V 275V
277V 320V
480V 600V

All Current Technology suppression filter systems maximum continuous operating voltages are in compliance with test and evaluation procedures outlined in NEMA L 1-1992, paragraphs 2.2.6 and 3.6.


Voltage Protection Mode A3 Ringwave B3 Ringwave B3/C1 Comb. Wave C3 Comb. Wave
120/208 L-N 210 260 380 480
120/208 L-G 350 365 370 540
120/208 N-G 250 290 360 520
120/208 L-L 360 480 700 810
277/480 L-N 460 580 835 980
277/480 L-G 800 755 765 990
277/480 N-G 500 570 785 1050
277/480 L-L 805 1040 1555 1780

All Current Technology suppression filter systems clamping voltages are in compliance with test and evaluation procedures outlined in NEMA LS 1-1992, paragraphs 2.210 and 3.10. Values indicate typical clamping voltage data for models with integral fused disconnect (DF).


Option Order Suffix
Double form “C” dry contacts -FCC
DTS-2 Diagnostic Test Set -DTS
StatusWatch diagnostic monitoring -SW
StatusWatch with display event counters -SWC

All StatusWatch diagnostic monitoring options include double form “C” dry contacts, audible alarm, alarm silence/test and status indicator lights.