Submetering Simplified
ASHRAE 90.1
ASHRAE 90.1 is a standard for measuring energy in commercial buildings. It covers many aspects of energy management, such as total consumption, HVAC and lighting systems, and individual circuits. For buildings over 10,000 square feet, with or without tenants, it is necessary to have multi-load branch energy monitoring equipment.
There are many conditions that need to be met to fully comply with the ASHRAE 90.1 standard, but at the heart of the energy monitoring section of the standard is Chapter 8.4.3.1 Monitoring section requires the monitoring of each of the following separately: Total energy consumption for the entire building, HVAC systems, Interior lighting, Exterior lighting as well as receptacle circuits. Multi-load meters enable acost effectivesolution to meeting this chapterin particular.
ISO 50001
ISO 50001 is a voluntary standard that provides the guidance and framework for organizations to support their sustainability goals and reduce the overall impact on the environment through energy conservation.
The six key parts of the standard focus on:
- Policy for using energy more efficiently
- Establishing targets and objectives to comply with the policy
- Taking the data and finding was to use it effectively to make changes
- Measure the impact of the actions
- Continuous review the effectivity of the policy
- Always be improving energy management
Power meters are a simple and effective way to support an ISO 50001 strategy and give building owners, employees, tenants, and managers the data they need to create a safe and sustainable work and living environment.
Setra Power Meter
Available in 3, 12, and 48 load options. The Power Meter from Setra is a networked revenue-grade power meter built on a versatile and powerful platform designed to meet the high demands for any submetering application.
Patrol Flex Coil
Offered in 12”, 24” and 36” lengths, the Patrol Flex Coil is the most accurate Rogowski Coil in submetering.
UL 2808 Split-Core CTs
Setra’s Split-Core current transformers provide a high accuracy current measurement over a wide dynamic sensing range for power metering applications. UL 2808 Certified
Measure More... For Less
1
Identify what's going to be metered
Look across the installation and identify the equipment that are to be measured to support energy strategy
Examples: Chillers, Lighting, AHU’s, Tenant Usage
2
Count up how many CT’s are needed
Match the CT amperage to the breaker feeding the load or use Patrol Flex Coils (up to 1500A)
Single-Phase Service = 1CT
Split-Phase Service = 2 CT’s
Three Phase Service= 3 CT’s
3
Select Meter Part Number
Take the CT count and select the meter with the right number by matching the CT’s with available inputs
SPM03EDN = 3 CT inputs
SPM12EDN = 12 CT inputs
SPM48EDN = 48 CT inputs
