BuyLog Flippingbook JUN 2024

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 levels of overcurrent protection devices as outlined in the illustration. • Tier 1: The meter center or switchboard main breaker 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, and does NOT serve • Tier 2: The meter stack tenant breakers • Tier 3: The load center branch breakers

Load center branch breakers (Tier 3) Meter stack tenant breaker (Tier 2) Meter center or switchboard main breaker (Tier 1)

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

Three-tier series combinations for 125A socket applications Coming soon

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 eMCB¹)

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 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 eMCB¹)

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

¹eMCBs consist of ABB THQL electronic breakers: THQL-AF, THQL-DF, and THQL-GF in both 1P and 2P configurations from 15A-60A.