Hi

Climeworks is a Swiss company that is a leader in Direct Air Capture (DAC) technology and projects. We capture CO2 from the atmosphere and safely store it underground permanently and sell the CDR credit to leading corporates, e.g. JP Morgan Chase, UBS, Microsoft and Boston Consulting Group, among many others. Climeworks is scaling its DAC technology and is developing a DAC hub in Louisiana, USA (with US Department of Energy funding) and is actively developing projects in other countries. 

We are conducting a global sourcing process to identify our preferred supply partners for various strategic engineered equipment packages and we’d like to discuss our Transformer package with you. 

Refer to the Specification below for our Main Aux Transformers and Balance of Plant (BoP) Transformers. Our Transformers are designed to ANSI/IEEE/ASTM codes and standards and we will purchase DDP to project site. We require 2 of each type of transformer for each project stage and we are sourcing for multiple projects concurrently (e.g. USA, KSA, China), so the total number of transformers we order each year may be 4 to 10 times larger than a single project stage. 

Please review this request and confirm whether you are interested in our upcoming sourcing process and in providing a budgetary quote?

2 No. Main Aux Transformer:
Windings	 	Specified Data
Number of Windings	-	2 with Buried Tertiary
Transformer Cooling Class(es)	-	ONAN/ONAF/ONAF
Transformer Vector Group	-	YNyn0+d
High Voltage (HV) Winding	 	 
Minimum Rated Apparent Power at Design Conditions at each cooling stage	MVA	58 / 77 / 98
Nominal Voltage (Phase-to-phase) / Winding BIL / Neutral BIL	kV	138 / 550 / 110
Neutral Connection	-	Solidly Grounded
Low Voltage (XV) Winding	 	 
Minimum Rated Apparent Power at Design Conditions at each cooling stage	MVA	58 / 77 / 98
Nominal Voltage (Phase-to-phase) / Winding BIL / Neutral BIL	kV	13.8 / 110 / 110
Neutral Connection	-	Resistance Grounded
Low Voltage (TV) Winding - Buried Tertiary	 	 
Minimum Rated Apparent Power at Design Conditions at each cooling stage	MVA	By Supplier

2 No. BoP Transformer:
Windings	 	Specified Data
Number of Windings	-	2
Transformer Cooling Class(es)	-	ONAN/ONAF/ONAF
Transformer Vector Group	-	Dyn1
High Voltage (HV) Winding	 	 
Minimum Rated Apparent Power at Design Conditions at each cooling stage	MVA	20 / 26.6 / 33.3
Nominal Voltage (Phase-to-phase) / Winding BIL / Neutral BIL	kV	13.8 / 110 / 110
Neutral Connection	-	N/A
Low Voltage (XV) Winding	 	 
Minimum Rated Apparent Power at Design Conditions at each cooling stage	MVA	20 / 26.6 / 33.3
Nominal Voltage (Phase-to-phase) / Winding BIL / Neutral BIL	kV	4.16 / 110 / 110
Neutral Connection	-	Resistance Grounded
Low Voltage (TV) Winding - Buried Tertiary	 	 
Minimum Rated Apparent Power at Design Conditions at each cooling stage	MVA	N/A

Please let me know if you have any questions.

Thanks
Michael Beattie
Senior Project Procurement Manager
Climeworks
Remove CO₂ from the air

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Climeworks Corporations 
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www.climeworks.com