Specifier Product Information
74000 Series
75000 Series
Panel-Mounted
7-Mode Surge
Protective Devices
(SPD’s) with
Advanced Monitoring
Capabilities
APPLICATION
Cat. Nos. 74000 and 75000 with removable
modules are designed for installation at the service
entrance and at branch panels, or as dedicated
TVSS for critical equipment. These devices provide
dedicated surge protection for each phase-toneutral, phase-to-ground and neutral-to-ground in
three-phase WYE systems. The diagnostic features
allow users to monitor surge events on the
incoming AC power line, including the magnitude,
date and time of the event.
74000 and 75000 Series
TYPICAL SPECIFICATION
All 74000/75000 units are designed for use where
a multi-phase, transient voltage surge suppressor
(TVSS) is specified. They provide full 7-mode
protection in 120/208V and 277/480V WYEconfigured, 3-phase systems. 74000 series panels
feature individually fused 40mm-diameter, metaloxide varistor arrays and EMI/RFI filter circuitry
equipped with high-voltage-rise capacitors for
harmonic tolerance. 75000 series panels employ arrester-grade 53mm-diameter MOV arrays for the
most severe surge exposure environments. Features include advanced diagnostic monitoring of
protection status for each phase, a surge event counter that records amplitude, date and time of event,
an audible alarm for protection status, and replaceable plug-in modules. All units have been tested to
ANSI/IEEE C62.45 standards for Category A, B and C environments and are UL 1449 (2nd Edition)
Listed. They are also backed by Leviton’s Limited Ten-Year Warranty.
Leviton Mfg. Co., Inc.—Power Quality Division • 860 Harold Place, Chula Vista, CA 91914
Tech line: 1-800-648-3332 • Fax: 619-205-8739
Inside view of the 74000
and 75000 Series
74000/75000 Series
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Performance Data
Performance Specifications
Cat. No.
Replacement
Rating
Module Cat. No. Operating
Frequency @ 50/
60Hz
Maximum
Continuous
Operating
Voltage
(MCOV)
(L-N)
Max. SinglePulse
Transient
Energy
(10x1000µs)
Joules
Max. SinglePulse Surge
Current
(8x20µs)
per mode
Max. SinglePulse Surge
Current
(8x20µs)
per phase
(L-N) + (L-G)
74120-7M3
HC120-M40
120/208V AC
3-Phase,
5-wire
(4-wire + ground)
150V AC
1440 per mode
10,080 per panel
200kA
400kA
74277-7M3
HC277-M40
277/480V AC
3-Phase, 5-wire
(4-wire + ground)
320V AC
2560 per mode
17,920 per panel
200kA
400kA
75120-7M3
HC120-M53
120/208V AC
3-Phase, 5-wire
(4-wire + ground)
150V AC
2280 per mode
15,960 per panel
320kA
640kA
75277-7M3
HC277-M53
277/480V AC
3-Phase, 5-wire
(4-wire + ground)
320V AC
4400 per mode
30,800 per panel
320kA
640kA
Clamping Performance
Cat. No.
UL 1449 Suppressed Voltage Ratings (SVR)†
75120-7M3
74120-7M3
L-L 800V
L-N 400V
L-G 400V
N-G 400V
75277-7M3
74277-7M3
L-L 1600V
L-N 800V
L-G 800V
N-G 800V
†Suppressed
Voltage Ratings (SVR) assigned at 6-inch lead
length with 6kV/500A impulse in accordance with UL 1449 (2nd
Edition)
Category C3 Testing: All 74000 and 75000 7-Mode devices have
been subjected to 1000 sequential Category C3 surges
Interior detail of the
74000 and 75000 Series
EMI/RFI Noise Rejection
All Cat. No. 74000/75000
7-Mode SPD’s
Normal Mode
Common Mode
Evaluation Bandwidth
5KHz – 5MHz
5KHz – 5MHz
Noise Rejection @ 50 Ohms
20 – 40dB
20 – 40dB
74000/75000 Series
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Functionality
Detail of Diagnostic Display Panel on the 74000 and 75000 Series
DIAGNOSTIC CAPABILITIES
• Monitors the status of each phase
• Display will indicate “Fault”, “Alert”, and “Protection” status
• Functions include a surge event counter, amplitude measurement, the date and the time of the event
• Events are stored and can be recalled and downloaded by the user
NORMAL OPERATIONS:
• Green indicators (up to 3) will no longer be illuminated during a fault condition
• Yellow indicator light will illuminate and audible alarm will sound when one of the fuses in the surge module opens due to surge activity.
The module screen will flash the percentage of protection that is active (e.g., 75% protection when 1 fuse is open)
• Red indicator light will illuminate and audible alarm will sound when protection level is at 50% or less
• Information is easily downloadable via RS-232/422 port using the program “Hyperterminal” that comes standard on any
Windows operating software
• Arrow buttons allow user to view surge event history on each line by scrolling through data
• Remove supervision—Cat. No. 52000-RS may also be used with 74000/75000 panels for remote monitoring
74000/75000 Series
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General Data
DIMENSIONAL DRAWINGS
8.33 (211.6 mm)
7.48 (190.0 mm)
15.75 (400.0 mm)
19.69 (500.0 mm)
PHYSICAL SPECIFICATIONS
Housing
NEMA Type 12 enclosure with a hinged front door secured with two key locks. Inside enclosure
is a second hinged door that protects the diagnostic and surge-protective circuitry when the
front door is open. Module system board constructed of UL-approved, fire-retardant plastic
Physical Dimensions (approx.)
H x W x D (approx.): 16.0" (406.4mm) x 20.0" (508.0mm) x 8.5" (215.9mm)
Mounting
Surface mount adjacent to protected equipment using (4) mounting holes on back panel and
(4) 1/4" to 5/16" bolts
Wiring
Board cable terminals can accept up to 6AWG conductors
Operating Temperature Range
-10º to 60ºC
Storage Temperature Range
-20º to 85ºC
AGENCY APPROVALS
• Listed UL 1449 Standard (2nd Edition)
• CSA Certified
PRODUCT MAINTENANCE
Information on the status panel of the LCD and an audible alarm will indicate when a module needs to be replaced. Plug-in module design
facilitates module replacement for installation and maintenance by the user with the AC power disconnected. An alarm will sound when the
module is at 50% of full protection capability.
FEATURES
• 7-mode protection (each phase-to-neutral, each phase-to-ground, and neutral-to-ground) for WYE-configured 3-phase AC systems
• Advanced circuit board design
• User-replaceable modules
• Real-time diagnostics monitor power and suppression status for each mode
• Provides surge magnitude, time and date for each surge event
• Surge event history can be downloaded for storage
• Clamping envelope tracks contour of the AC sine wave
• Equipped with optically-isolated dry contacts rated 5A 120/240V AC for remote monitoring
Leviton Mfg. Co., Inc.—Power Quality Division • 860 Harold Place, Chula Vista, CA 91914
Tech line: 1-800-648-3332 • Fax: 619-205-8739
Visit Leviton’s web site: www.leviton.com
© 2002 Leviton Manufacturing Co., Inc. All rights reserved.
C-627/D2-10M rs