BuyLog Flippingbook OCT 2024 v2

METERING, BUYLOG SECTION 2

2-52

— ReliaMod™ Series ratings Three-tier series ratings guide for modular metering

UL three-tier series connected rating UL permits assigning a short circuit rating (kAIC) to a combination of overcurrent protection devices connected in series that is higher than the lowest rated overcurrent protection device in the combination. This allows you to use lower kAIC downstream breakers, thus reducing the cost of your project. Series rating with UL standards in multi-family applications using the ABB empower configurator in conjunction with ABB series rating publication DET-008 can greatly reduce the total cost of your bill of material.

A three-tier series rating is common in a multi-family application with ABB ReliaMod™ modular metering. It consists of three outlined in the illustration. • Tier 1: The meter center or switchboard main breaker • Tier 2: The meter stack tenant breakers • Tier 3: The load center branch breakers levels of overcurrent protection devices as A three-tier series rating system occurs when there is a UL tested and approved combination of three levels of overcurrent protection. In this system the short-circuit rating of the upstream protector is fully rated at its

location, but both tiers of downstream overcurrent protectors are not fully rated and each has a lower interruption rating (kAIC) than the available fault current at its location. This is allowable by UL. The below tables are a quick reference guide of some common UL recognized ABB three-tier series rating combinations between main breakers in meter centers (or switchboards) to downstream tenant breakers in meter stacks and downstream load center branch breakers. This is a guide only, not all inclusive,

Please refer to the latest version of ABB series rating publication DET-008 for the latest official UL recognized series ratings and documentation.

Meter center or

Meter stack tenant

Load center branch breakers (Tier 3)

switchboard main breaker (Tier 1)

breaker (Tier 2)

and does NOT serve as official documentation.

Three-tier series combinations for 125A socket applications Meter stack application Main upstream device (Tier 1)

Meter stack tenant breakers (Tier 2) Tenant breaker frame Amperage Poles

Load center branch breakers (Tier 3)

Series rated interrupting rating

Socket amperage

Main breaker frame Amperage Poles

Branch breaker frame Amperage Poles Symmetrical amps Phase

Vac

15A-60A 1 and 2

65,000

1 240

125A

T8V

1400A- 2000A

2 and 3

THHQL-RM¹ 40A-125A

2

THQL (includes both thermal mag and eMCB²) THQL (includes both thermal mag and eMCB²)

E2.2SF (Emax 2) SS (PBII) XT7S

15A-60A 1 and 2

65,000

1

1000A- 1200A

2 and 3

THHQL-RM¹ 40A-125A

2

XT6N

800A 2 and 3

THHQL-RM¹ 40A-125A THHQL-RM¹ 40A-125A

2 2

15A-60A 1 and 2 15A-60A 1 and 2

65,000 65,000

1 1

XT5N 400A-600A 2 and 3

Three-tier series combinations for 225A socket applications Meter stack application Main upstream device (Tier 1)

Meter stack tenant breakers (Tier 2) Tenant breaker frame Amperage Poles

Load center branch breakers (Tier 3)

Series rated interrupting rating

Socket amperage

Main breaker frame Amperage Poles

Branch breaker frame Amperage Poles Symmetrical amps Phase

Vac

15A-60A 1 and 2 65,000 and 100,000

1 240

225A

T8V

1400A- 2000A

2 and 3

Formula A1N or A2N

40A-225A

2

THQL (includes both thermal mag and eMCB²)

E2.2SF (Emax 2) E2.2VF (Emax 2)

65,000 100,000 65,000 100,000 65,000 100,000 65,000 100,000 65,000 100,000

1 1 1 1 1 1 1 1 1

SS (PBII) SH (PBII)

15A-60A 1 and 2

XT7S XT7H XT6N XT6S

1000A- 1200A

2 and 3

Formula A1N or A2N Formula A1N or A2N Formula A1N or A2N

40A-225A

2

THQL (includes both thermal mag and eMCB²)

800A 2 and 3

40A-225A

2

15A-60A 1 and 2

XT5N 400A-600A 2 and 3

40A-225A

2

15A-60A 1 and 2

XT5S 1 ¹ THHQL-RM frame tenant breakers are different order code numbers with special series ratings compared to traditional THQL/THHQL breakers. Please see the tenant breaker section of the BuyLog for the complete offering of THHQL-RM frame breakers for ReliaMod™ or ABB series rating publication DET-008 for more info on series ratings. ²eMCBs consist of ABB THQL electronic breakers: THQL-AF, THQL-DF, and THQL-GF in both 1P and 2P configurations from 15A-60A.