BuyLog Flippingbook JUN 2024

METERING, BUYLOG SECTION 2

2-51

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

UL two-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 two-tier series rating is common in a multi-family application with ABB ReliaMod™ modular metering. It consists of two levels of overcurrent protection devices as outlined in the illustration. • Tier 1: The meter center or switchboard main breaker • Tier 2: The meter stack tenant breakers

A two-tier series rating system occurs when there is a UL tested and approved combination of two levels of overcurrent protection. In this system the short circuit rating of the upstream protector is fully rated at its location, but the downstream overcurrent protector is not fully rated and 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 two-tier series rating combinations between main breakers in meter centers (or switchboards) to downstream tenant breakers in meter stacks. This is a guide only, not all inclusive, and does NOT serve 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.

Meter center or switchboard main breaker (Tier 1) Meter stack tenant breaker (Tier 2)

Two-tier series combinations for 125A socket applications Meter stack application Upstream device (Tier 1)

Downstream device (Tier 2)

Series rated interrupting rating

Socket amperage

Main breaker frame

Tenant breaker frame

Amperage

Poles

Amperage 70A-125A 60A-125A 60A-125A 70A-125A 60A-125A 70A-125A 60A-125A 70A-125A 70A-125A

Poles

Symmetrical amps

Phase

Vac 240

125A

T8V 1400A-2000A 2 and 3

THQL

2 2 2 2 2 2 2 2 2

42,000 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

TEY or TEYF

TEYL THQL

XT7S 1000A-1200A 2 and 3

XT7H XT6N XT6S

TEY or TEYF

800A 2 and 3

THQL

TEY or TEYF

XT5N 400A-600A 2 and 3

THQL THQL

XT5S

Two-tier series combinations for 225A socket applications Meter stack application Upstream device (Tier 1)

Downstream device (Tier 2)

Series rated interrupting rating

Socket amperage

Main breaker frame

Tenant breaker frame

Amperage

Poles

Amperage 40A-225A

Poles

Symmetrical amps

Phase

Vac 240

225A

T8V 1400A-2000A 2 and 3 Formula A1N or A2N

2 65,000 and 100,000

1 1 1 1 1 1 1 1 1 1 1

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

2 2 2 2 2 2 2 2 2 2

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

SS (PBII) SH (PBII)

XT7S 1000A-1200A 2 and 3 Formula A1N or A2N

40A-225A

XT7H XT6N XT6S

800A 2 and 3 Formula A1N or A2N

40A-225A

XT5N 400A-600A 2 and 3 Formula A1N or A2N

40A-225A

XT5S