Joslyn Hi-Voltage 1261-21 Series Data Sheet

SURGE PROTECTIVE DEVICES

available configur ationS

Model Number kA Per Phase Voltage Configuration

1261-21-xx 40kA 230V 1-Phase, 2-Wire + Ground

xx = -TNG, -TMS, -TT, -IT, -IT-L

Warranty

3-years

Available Options

Mounting Bracket Add sufﬁx -B

Surgitron® III 1261-21 Series

MEDIUM DUTY FOR RESIDENTIAL OR INDUSTRIAL APPLICATIONS

feature S and benefitS

• Listed to UL 1449 3rd Edition for a Type 2 SPD application.

• Individual fusing for each Metal Oxide Varistors (MOVs).

• There is a 1261 model for each power system conﬁguration (neutral

grounding practice) as deﬁned in EN60950: TNC – Neutral and PE (protected earth conductor) are combined

throughout the system while TNCS splits the combined PEN into a separate neutral and PE at the service entry; the U.S. practice is a variation of this. The neutral is earthed at the transformer for both types. The model 1261-21-TNC is suited for both TNC and TNCS systems.

TNS – Neutral is earthed at the transformer; however, is not bonded to earth or the PE elsewhere. The PE is carried to the site from the transformer and bonded to site earth. Model 1261-21-TNS is intended for use on this system; it can also be used on TNCS as well as on U.S. 120/240V services without the neutral.

TT – Neutral is earthed at the transformer. The PE originates at site; however, is not bonded to the neutral. There is no interconnection between the PE and transformer earth. The 1261-21-TT is for use on this system; it can also be employed upon TNS, TNCS and U.S. services without neutral.

IT and IT-L – The transformer is unearthed or earthed through high impedance. The PE originates at site; however, is not bonded to a service conductor. No conductor in this system is designated as neutral. The 1261-21-IT is suited for this application; it can also be used on TT, TNS, TNCS and U.S. services without neutral power systems.

Product SPecificationS

Electrical

Nominal Discharge Current Rating (I-n) 20kA Operating Frequency 50–60Hz Connection Methods Parallel to Load (shunt)

#14 AWG wires

30A Max Breaker Modes of Protection Model Dependent Fault Rating (SCCR) 100kAIC Response Time Less than 1 nanosecond (one per phase) Standard Monitoring LED status indicator lights

Mechanical

Weight 2 lbs. (.9 kg) Enclosure Type NEMA 1, Non-metallic Installation Location Indoor

Mechanical (Continued)

Mounting Method 1/2" – 14 NPS Thread

(Aluminum Bracket Optional) Operating Environment -40° to +176°F (-40° to +80°C) Altitude Up to 16,400 ft. (5000 m) Product Design Individually fused MOVs

Overcurrent Fusing

Thermal Fusing

Regulatory

UL 1449 3rd Edition Type Type 2 UL 1283 No IEEE C62.41.1, .2, C62.45 Yes Listed By UL

Surgitron iii PerforMa nce data

Model Number Voltage Configuration Protection Modes MCOV 6kV 3000A VPR

1261-21-TNC 230 L-N 300 1200 N-G 0 1200 1261-21-TNS 230 L-N 300 1200 L-G 300 1200 N-G 0 1200 1261-21-TT 230 L-N 300 1800 L-G 300 1200 N-G 0 1800 1261-21-IT 230 L-N 300 1200 L-G 480 1800 N-G 0 1800 1261-21-IT-L 230 L-N 300 1200 L-G 480 1800 N-G 0 1800

UL 1449 3rd Edition

diMenSional SPecificationS

2.93"

(75mm)

3.56"

(90mm)

ø .21" (5.5mm) 2 HOLES

1.26"

(32mm)

1.37"

(35mm)

2.52"

(64mm)

BRACKET DETAIL

2.93" (75mm)

.75" (19mm)

1/2–14 NPT Thread

#14 AWG (2mm STRANDED WIRE 600V PVC INSULATION 18" (450mm) LONG

ALUMINUM BRACKET

)