TELEPHONE GAS STATION PROTECTOR MODULES



TII 355 MAXIMUM DUTY
TII 356 HEAVY DUTY
TFS® TOTEL FAILSAFE® THREE-ELECTRODE GAS TUBE SURGE PROTECTOR MODULES
(Patent No.4,212,047)

UL Listed CSA Certified REA Accepted

The totally encapsulated TFS® Totel Failsafe ® modules protect against both longitudinal and metallic surges by grounding both sides of the pair simultaneously when a surge arrives on either side of the pair. After the surge is cleared the protector resets to its normal high impedance condition. If a power-cross or other condition results in excess current flow for an extended period, the thermal failsafe system grounds the line safely and permanently. Backup airgaps are included to insure protection in the rare instance that the gas tube has vented.

TFS® modules are available in Maximum or Heavy Duty ratings to cover a complete range of telecommunication requirements. They are supplied as a basic component of TII station protectors and as replacement items. Individual modules contain a No.10 binding post for each side of the protector pair and a ground strap for connection to a ground post. Ground connection should be made with minimum resistance in accordance with best practices as specified for the intended application. Specifications for the TII TFS® modules are given below.

Dimensions: 0.75" x 0.63" x 2.13"
Weight: 2.2 oz.
Standard Package: 50 Pieces

MODEL DESCRIPTION
TII 355 ( ) Three-Electrode TFS ® Protector Module, Maximum Duty
TII 356L Three-Electrode TFS ® Protector Module, Heavy Duty
TII 356M1 Three-Electrode TFS ® Protector Module, Heavy Duty

Please insert L or M in place of ( ).
* M designates a protector module meeting the REA, PEG and other industry requirements.
* L designates a protector module meeting specific Bell System requirements.

 
SPECIFICATIONS TII 355L                          TII 356L
DC Breakdown (Line tc
Ground:		 265 - 600 Volts
lmpulse Breakdown@
100V/µs		 500V Typical
750V Maximum
Insulation Resistance @ 100V dc > 100 Megohms
Airgap Breakdown Voltage 1200 Volts Maximum
DC Holdover
@52.5V, 260 mA
@135, 200 mA
Extinguish in < 150 ms
Impulse Life:
600A, 10/1000us waveform
(300A on each side to ground
simultaneously) either polarity		 50 operations
Maximum Single Impulse Discharge Current 8/20 waveform: 40kA
20kA each side simultaneously
Short Duration - 60Hz
1000 VAC, 10A, 1 Sec
1000 VAC, 1A, 1 Sec
5 Operations
60 Operations

Service Life: 
10Amp,10/1000μsec waveform:  100Amp,10/1000μsec waveform:  300Amp,10/1000μsec waveform: 
1500 Surges Minimum
100 Surges Minimum
50 Surges Minimum
Capacitance: <30pF (L to G)
Test Method: IEEE 465.1, TELCORDIA GR-1361 CORE

 

SPECIFICATIONS TII 355M               TII 356M1
DC Breakdown (Line to Ground) 300 - 500 Volts 
Impulse Breakdown @ 100V/us 500V Typical @ 50V Maximum
Impulse Resistance @ 100V dc 100 Megohms
Airgap Breakdown Voltage: Meets UL 497A
DC Holdover: 150 Volts minimum @ 200 mA
Impulse Life:
1000A, 10/1000 µsec waveform (500A on each side to ground simultaneously) either polarity		 1000 surges                   400 surges
minimum                         minimum
Maximum Single Impulse Discharge Current 8/20 waveform: 40kA
20kA each side simultaneously
Service Life:  

1000A, 10/1000 waveshape at one minute intervals each 1000 Surges Minimum  polarity, with 500A on each side to ground simultaneously
AC Discharge Current 11 Cycles, 60 Hz: 400Arms                        130A rms
(200A each line              (65A each line
to ground                      to ground
simultaneously                simultaneously
Capacitance: < 30pF (L to G)

Test Method: IEEE 465.1, RUS PE-80

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