Telect 125DM08 Installation Manual

Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: 125DM08

Installation Guide

Applies to : 125DM08

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

Table of Contents

1.1 Overview ......................................................................................................................... 4

1.2 Specications ..................................................................................................................5

1.3 Inspection .......................................................................................................................5

1.4 Installation .......................................................................................................................6

1.4.1 Important Installation Guidelines ............................................................................. 6

1.4.2 Installation Procedure .............................................................................................7

1.5 Replacing Alarm Cards .................................................................................................14

1.6 Accessories ...................................................................................................................15

1.7 Compression Lugs ........................................................................................................ 16

Figures

Figure 1 - Model 125DM08 (UL Listed, File E139903) .........................................................4

Figure 2 - 125DM08 - TFD .................................................................................................... 4

Figure 3 - Bracket Orientation ...............................................................................................8

Figure 4 - Rack Mounting .....................................................................................................8

Figure 5 - Ground Terminal Harware ....................................................................................9

Figure 6 - Ground Terminal Hardware ..................................................................................9

Figure 7 - Input & Output Lug Connections ..........................................................................9

Figure 8 - LEDs on Front Panel .......................................................................................... 10

Figure 9 - Removing Blank Covers ..................................................................................... 10

Figure 10 - Installing Circuit Breaker .................................................................................. 11

Figure 11 - Installing Circuit Breaker ................................................................................... 11

Figure 12 - Installing TFD Fuse Holders ............................................................................. 11

Figure 13 - Installing TPS/TLS Fuses ................................................................................. 12

Figure 14 - Alarm Relay Terminals on Rear of Panel .......................................................... 13

Figure 15 - Alarm Card in Place ..........................................................................................14

Figure 16 - Alarm Card Removed .......................................................................................14

Figure 17 - Typical 125DM08 Circuit .................................................................................. 17

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

1.1 Overview

Telect’s Demarcation Fuse/ Circuit Breaker Panel with
Alarms provides TPS/TLS fuse or circuit breaker
protection at the equipment interface. The 2RU, white
panel supports

• eight TFD fuse holders

or

• bullet-style, standard-trip circuit breakers with
rear access terminals

and

• a replaceable alarm card containing power and
alarm LEDs, with rear-access, wire-wrap alarm
relay contacts

Each fuse holder or circuit breaker position has
separate BATT/RTN inputs and outputs rated up to
125A for either +\-24Vdc or -48Vdc applications.

Front

Rear

Figure 1 - Model 125DM08 (UL Listed, File E139903)

Hardware is included for either ush or extended
mounting in a 19-in. or 23-in. relay rack. Visit our
website (www.telect.com) to order accessories and
replaceable parts: fuses (up to 125A),TFD fuse holder,
circuit breakers (up to 100A), ETSI mounting brackets,
and more.

NOTE: The 125DM08-TFD includes eight TFD
holders installed.

Figure 2 - 125DM08 - TFD

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

1.2 Specications

Inputs/Outputs: Specication:

Max. Rating Single-Pole, Circuit Breaker (each) 100A

Max. Rating TFD Holder, Schematic C 125A (TLS Fuse); 70A (TPS Fuse)

Max. Continuous Output Load (each) 80% of rated

Max. Total Load Rating of Panel 800A continuous

Voltage Range ±20 to ±28 Vdc

-40 to -60 Vdc

BATT & RTN Wire Size #8 to #1 AWG

Ground Wire Size #10 to #2 AWG (depends on input fuse)

Terminal Stud Sizes
(Input, Output, and Earth Ground)

Power Dissipation 17W per I/O

Short-Circuit Withstand Rating 5000A

Alarms: Specication:

Alarm Relay Contacts 0.6A @ 60 Vdc

Alarm Card Power Rating 1W

Alarm Wire Size Solid: #26 to #22 AWG

Weight: Specication:

Weight, Shipping ~20 lb (~9 kg) - 125DM08

Dimensions: Specication:

Nominal, without brackets:
Width
Height

Depth

Environment: Specication:

Operating Temperature -5°C (23°F) to 50°C (131°F)

¼-20 dual studs on 5/8” centers
¼-20 dual PEMs on 5/8” centers (side ground)

~22 lb (~10 kg) - 125DM08-TFD

17.25 in (43.8 cm)

3.5 in (8.9 cm)

10.84 in. (27.6 cm)

1.3 Inspection

Please read these instructions carefully before beginning installation. If you need assistance, call Technical
Support at 1.888.821.4856 (domestic calls), or 509.921.6161 (Option 2), or email us at [email protected].

Inspect equipment after unpacking and compare it to the packing list. Immediately report any shipping damage,
defects, or missing parts to Telect at 1.800.551.4567. Keep all documentation that comes with your shipment.

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

Telect is not liable for shipping damage. If the product is damaged, notify the carrier and call Telect’s Customer
Service Department at 1.800.551.4567 (domestic only) or 1.509.926.6000 for further recourse.

NOTE: For service or warranty information, please visit the telect.com website, or email inquiries to getinfo@
Telect.com and click on the “Support” tab, or phone us at 800.551.4567 (domestic only) or 509.926.6000.

ALERT

!

ALERT! Verify that all connections meet requirements specied in local electric codes or operating

company guidelines before supplying power. Protect this equipment with a fuse or breaker
sufcient to interrupt power levels specied on the preceding pages.

INSTALL THIS PRODUCT WITHIN A RESTRICTED ACCESS LOCATION WHERE ACCESS IS THROUGH
THE USE OF A TOOL, LOCK AND KEY, OR OTHER MEANS OF SECURITY AND IS CONTROLLED BY THE
AUTHORITY RESPONSIBLE FOR THE LOCATION. ONLY QUALIFIED TECHNICIANS MAY INSTALL AND
MAINTAIN THIS PRODUCT.

1.4 Installation

NOTES:

• Fuse holders, fuses, and circuit breakers are sold separately. See “1.6 Accessories” on page 12 for
part numbers.

• Do not remove terminal protection brackets, until panel is installed in a rack. If the panel is transported outside
of the shipping container, make sure the terminal protection brackets are installed.

1.4.1 Important Installation Guidelines

• Elevated Operating Ambient - If you install this product in a closed or multi-unit rack assembly, the

operating ambient temperature of the rack environment may be greater than room ambient. Therefore,
consider installing the equipment in an environment compatible with the maximum ambient temperature
(Tma) specied by the manufacturer.

• Reduced Air Flow - When you install this equipment in a rack, make sure you do not compromise the amount

of air ow required for safe operation of the equipment.

• Mechanical Loading - When you mount the equipment in the rack, make sure to keep the mechanical load

balanced to prevent a hazardous condition.

• Circuit Overloading - Pay attention to the connection of the equipment to the supply circuit and the effect

that overloading of the circuits might have on overcurrent protection and supply wiring. Appropriately consider
equipment nameplate ratings when addressing this concern.

• Reliable Earthing - Maintain reliable earthing of rack-mounted equipment. Pay particular attention to supply

connections other than direct connections to the branch circuit (e.g., use of power strips).

• Disconnect Device - Incorporate a readily available disconnect device into the building installation wiring.

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Demarcation Fuse/Circuit Breaker Alarm Panel

LINE

LOAD

TPC Fuse Holder

M AK E SU RE A LA RM
C ON NE CTO R O N FU SE H OL DE R
IS STR AI T B EF ORE IN SE R TI NG
IN TO T HE PAN EL

A b en t a larm bay on et on a fuse
ho lder can ei th er ca use int ern al
da m ag e t o the pa ne l or f ail to ma ke
el ect rical cont ac t w ith a larm w iring
w ithi n th e pa ne l.

CAUTION !

Power :: Model 125DM08

1.4.2 Installation Procedure

NOTE: Panel brackets are available for ush mounting in a 19-in. rack. A pair of 23-in. rack brackets are also
included. Either pair of brackets can be moved or installed to extend front of panel beyond the face of the rack in
1-in. (2.54 cm) increments.

WARNING

!

WARNING! Failure to properly ground this equipment can create hazardous conditions to installation
personnel and to the equipment.

NOTE: Input and output wire size for this panel must be rated for the corresponding breaker/fuse size at the
power distribution unit (PDU). The input wiring to this panel may be a greater size to accommodate a voltage drop
from the primary power source.

WARNING

!

WARNING! Before connecting input power cables, make sure input power to panel is turned off.

NOTE: Always follow operating company guidelines when connecting input wiring to the primary power source.

CAUTION

!

CAUTION!

Make sure the alarm connector on the fuse holder is straight before

LINE

TFD Fuse Holder

inserting into the panel.

A bent alarm bayonet on a fuse holder can either cause internal damage to the
panel or fail to make electrical contact with the alarm wiring within the panel.

LOAD

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

1. If necessary, to move or replace the 19-in. brackets, remove the three screws on the sides of the breaker
panel, as shown in Figure 2.

Figure 3 - Bracket Orientation

2. Install 19-in. or 23-in. brackets for ush or extended panel presentation on rack.

3. Locate an unused rack position and mount panel using the four thread-cutting screws provided, as shown

in Figure 3.

4. Tighten the screws to 35 in.-lb (4.29 N•m).

5. Use a UL/NRTL-approved crimping tool to attach a UL/NRTL-approved, 2-hole compression lug (t 1/4-20

dual studs on 5/8 in. centers) onto a #10 to #2 AWG ground wire. (The size of the ground wire depends on
size of input BATT wires.)

6. Attach the opposite end of the ground wire to the relay rack, per local practices.

Figure 4 - Rack Mounting

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

NOTE: The 125DM08 is DC-I, and can be grounded in both CBN and IBN networks. All eight ports have isolated
returns, and the chassis grounds are isolated from all returns. The 125DM08 is suitable for installation in network
telecommunication facilities and in locations where the NEC applies.

7. If required, lightly coat antioxidant on lug, grounding terminal, and contacting surface.

8. Remove the hardware over the terminals on the side of the panel. See Figure 4.

9. Connect the lug to the terminal using the nuts and washers removed in step 8, as shown in Figure 5.

Figure 6 - Ground Terminal Hardware

Figure 5 - Ground Terminal Hardware

10. Tighten the nut to 20 in.-lb (2.27 N•m).

11. Make sure the input power is OFF.

12. For input wiring — wiring used as inputs to this

demarcation panel — crimp straight, 2- hole
compression lugs (t 1/4-20 dual studs on 5/8 in.
centers) onto #8 to #1 copper wires. Insulate lug
barrels with UL94 V-0 rated heat shrink tubing.

13. Clean the terminals with a nonabrasive,
nonmetallic pad.

14. If required, lightly coat anti-oxidant on lugs and
input terminals, and then connect lugs to input
terminals on back of panel, as shown in
Figure 7. Tighten lugs to 50 in.-lb (5.5 N•m).

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Figure 7 - Input & Output Lug Connections

6

Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

15. Before installing breakers or fuse holders and
output wiring, turn power on to verify input power
and indicators:

• Verify input voltage and polarity.

• Whenever power is supplied, expect the
corresponding PWR ON LED to light.

16. For output wiring, repeat Steps 7 through 12 for
BATT and RTN outputs (crimp output wires to
lugs, clean output terminals, and attach lugs to
output terminals).

17. Heat shrink the insulation onto the lug barrels.

18. Record the circuit assignments on the pull-out

designation card below the alarm display.

19. Install plastic covers over the terminals

CAUTION

!

CAUTION! Telect recommends that the individual
circuit load not exceed 80% of fuse capacity
(for example, 100A fuse x .80 = 80A max. load).

Figure 8 - LEDs on Front Panel

20. Make sure output devices — devices fed from the
outputs of this demarcation panel — are disabled.

21. As shown in Figure 8, remove the blank cover(s)
from the position(s) you plan to use by unscrewing
and removing the small Phillips screw at the bottom.
Keep the hardware for later use.

NOTE: For safety, leave blank covers over all
unused positions.

22. With input power off, rmly install the circuit breakers
or fuse holders in the panel. Make sure the alarm
connectors on the rear of the breakers or holders
are straight before installation. See Figures 8
through 10.

Figure 9 - Removing Blank Covers

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

Figure 10 - Installing Circuit Breaker

23. See Figures 9 and 10 for installing circuit breakers.

24. See Figures 11 and 12 for installing TFD holders and fuses. Fuse holders are designed so that you can install
them in only one way.

Figure 11 - Installing Circuit Breaker

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Figure 12 - Installing TFD Fuse Holders

8

Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

Figure 13 - Installing TPS/TLS Fuses

ALERT

!

ALERT! You can install fuse holders backwards. Observe the LINE and LOAD designations on the panel
vs the designations on the fuse holders.

25. Use the screws supplied with each fuse holder or circuit breaker to secure the bezels. Attach the bezel to the
chassis with the blank cover screw previously removed.

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

26. Test the Alarm Card:

a. Make sure to apply power to at least one feed,
and make sure that, for each powered feed,
you have installed a valid fuse or circuit breaker
in the ON position.

b. Make sure the Power LED(s) is green and the
Alarm LED(s) is green on the front panel.
Expect an open circuit between C and NO and
a closed circuit between C and NC on the rear
alarm pins.

c. Remove a fuse(s) or turn a circuit breaker(s) to

the OFF position.

d. Verify the Power LED(s) is green and the Alarm
LED(s) is red on the front panel. Expect a
closed circuit between the C and NO and an
open circuit between the C and NO on the rear
alarm pins.

27. Wire-wrap alarm pins with solid #26 to #22 AWG.

28. Enable loads and verify the normal operating con-

ditions outlined in the preceding notes.

Figure 14 - Alarm Relay Terminals on Rear of Panel

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

1.5 Replacing Alarm Cards

The alarm card is held in place by two captive thumbscrews on the front of the alarm card panel.

Captive

Screw

Figure 15 - Alarm Card in Place

To remove and replace an alarm card, unscrew the thumbscrews and pull out the card.

Captive

Screw

When replacing an alarm card, make sure the edge connector on the far end of the assembly docks securely into
the connector inside the panel.

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Figure 16 - Alarm Card Removed

11

Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

1.6 Accessories

Item Description Part Number

Alarm Card PWR ON / Alarm LED 400747

Circuit Breakers 25A 090-0052-0025

30A 090-0052-0030

40A 090-0052-0040

50A 090-0052-0050

60A 090-0052-0060

70A 090-0052-0070

90A 090-0052-0090

100A 090-0052-0100

TFD Fuse Holder Kit 25-125A with Bullet-Style Connectors for TPS/

TLS fuses with plastic faceplate

25-125A with Bullet-Style Connectors for TPS/
TLS fuses with metal faceplate

TPS Fuses 5A 130481

10A 130485

15A 130487

20A 130489

25A 130476

30A 130478

40A 130482

50A 130484

60A 130486

70A 130488

TLS Fuses 80A 140640

90A 140641

100A 140642

110A 140643

125A 140644

090-0001-0033

090-0001-0034

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

1.7 Compression Lugs

ALERT

!

ALERT! Only use components and crimping tools approved by agencies or certifying bodies recognized

in your country or region such as Underwriter’s Laboratories (UL), TUV, etc.

Table 1 - Lugs (Support Dual ¼-20 Studs, 5/8” C-C)

Telect T & B Burndy Panduit

Lug Die Lug Die Lug Die Lug Die

#10 AWG 06117-12

#8 AWG 06117-11

#6 AWG 06117-01

#4 AWG 06117-04

#2 AWG 06117-02

#1 AWG 06117-133 11 YA1CL2NT14 11 LCD2/0-14A-X4P29

1

1

2

2

3

P21 52040410 21 YA8CL-2TC14 49 LCD8-14A-L P21

24 54205 24 YA6CL-2TC14 7 LCD6-14A-L P24

29 54206 29 YA4CL-2TC14 8 LCD4-14A-L P29

10 54207 33 YA2CL-2TC14 10 LCD2-14A-L P33

54201 YAV10-2TC14 LCD10-14A-L

1. 2 lugs included, supplier Panduit

2. 2 lugs included, supplier T&B

3. 2 lugs included, supplier Burndy

4. Lug ts wire size 2/0

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

TFD-101-011-05

MAIN HSG

LINE

REMOVABLE CARTRIDGE

RES GEN

R1

2

1

2 OHM, 5W

32

1

FH1

0.180A

GMT-FUSE-HLDR

125V

TPS-TLS

1

F1

2

ALARM

LOAD

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Figure 17 - Typical 125DM08 Circuit

14

Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

Rear View

10.840

10.000

9.000

Top View

3.470

17.250

18.312

19.000

Front View

Telect assumes no liability from the application or use of these products. Neither does Telect convey any license
under its patent rights or the patent rights of others. This document and the products described herein are subject
to change without notice.

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Demarcation Fuse/Circuit Breaker Alarm Panel

Power :: Model 125DM08

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