{"id":17348,"date":"2025-11-17T21:23:41","date_gmt":"2025-11-17T21:23:41","guid":{"rendered":"https:\/\/manuals.seakeeper.com\/seakeeper\/seakeeper-40-operation-manual-90716-1-copy\/specifications-and-summary\/"},"modified":"2025-11-17T21:23:41","modified_gmt":"2025-11-17T21:23:41","slug":"specifications-and-summary","status":"publish","type":"page","link":"https:\/\/manuals.seakeeper.com\/seakeeper\/seakeeper-40-operation-manual-90716-2\/specifications-and-summary\/","title":{"rendered":"7.0 Specifications and Summary"},"content":{"rendered":"\n
<\/th>Seakeeper<\/span> 40<\/th><\/tr><\/thead>
Rated RPM<\/strong><\/td>5,150 RPM<\/td><\/tr>
Angular Momentum at Rated RPM<\/strong><\/td>40,000 N-m-s<\/td><\/tr>
Anti-Rolling Torque at Rated RPM<\/strong><\/td>104,720 N-m<\/td><\/tr>
Spool-up Time to Rated Speed<\/strong><\/td>70 minutes (5,150 RPM)<\/td><\/tr>
Spool-up Time to Stabilization <\/strong><\/td>40 minutes (3,863 RPM)<\/td><\/tr>
Spool-up Power<\/strong>
AC Motor
DC Control<\/td>		5,000 Watts Max
240 Watts<\/td><\/tr>
Operating Power<\/strong>
AC Motor
DC Control<\/td>		1,900 – 4,400 Watts (Sea state dependent)
240 Watts<\/td><\/tr>
Voltage<\/strong>
AC Input
DC Input<\/td>		208-230 VAC (\u00b110%), 50\/60 Hz, Single Phase, 30 A
24 VDC @ 15 A for control power
24 VDC @ 20 A for seawater pump<\/td><\/tr>
Seawater Supply to Heat Exchanger<\/strong><\/td>15 GPM (57 LPM) maximum
13 GPM (49 LPM) minimum<\/td><\/tr>
Ambient Air Temperature<\/strong><\/td>32\u02da – 140\u02daF (0 – 60\u02daC)<\/td><\/tr>
Weight<\/strong><\/td>4,074 lbs (1,848 kg)<\/td><\/tr>
Envelope Dimensions<\/strong><\/td>54.3 L X 55.9 W X 40.6 H (inches)
1.38 L x 1.42 W x 1.04 H (meters)<\/td><\/tr>
Noise Output<\/strong><\/td>At full operating RPM, steady state noise measured in the factory at a 1-meter distance measures <73 dBC (sound levels may be higher during spool-up).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n
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Arrangement<\/strong>
The Seakeeper<\/span> 40 consists of the Flywheel, Enclosure, Foundation, Electronics, Brake, Cooling, and Cover Subsystems.

Installation Location
<\/strong>The Seakeeper<\/span> is a torque device and does not have to be installed in a specific hull location or on the centerline. However, the Seakeeper<\/span> should not<\/strong> be installed forward of the longitudinal center of gravity in a planing vessel.

Mounting Dimensions
<\/strong>See Drawing No. 90714 \u2013 Seakeeper<\/span> 40 Bolt-In Installation Details.

Loads<\/strong>
The installer is responsible for designing the foundation to which the Seakeeper<\/span> is attached and for ensuring that this foundation can safely transfer the concentrated Seakeeper<\/span> loads from the frame to the adjacent hull structure. Loads that the Seakeeper<\/span> imposes on the hull structure are explained in Drawing No. 90714 \u2013 Seakeeper<\/span> 40 Bolt-In Installation Details; these loads do NOT include vessel motion accelerations, such as vertical slam loads which can be high for higher speed vessels.

Cooling<\/strong>
The Seakeeper<\/span> bearings, Motor Drive Box, and hydraulic manifold are cooled by a closed water \/ glycol mix cooling loop that incorporates a seawater heat exchanger. The installer is responsible for providing 13 \u2013 15 GPM (49 – 57 LPM) raw water at ambient sea temperature and a maximum pressure of 20 psi (1.4 bar) to the heat exchanger.

Electrical<\/strong>
The installer is responsible for supplying 208-230 VAC, 50\/60 Hz, single phase power to the Motor Drive Box. Additionally, the installer is responsible for supplying 24 VDC at 15 A service to the Seakeeper<\/span> Control System and 24 VDC at 20 A for the Seawater Pump. Separate circuit breakers should be used for each Motor Drive Box in multiple Seakeeper<\/span> installations. Similarly, separate circuit breakers should be used for each Seakeeper<\/span> Control System and DC Seawater Pump in multiple Seakeeper<\/span> installations.

Operator Controls
<\/strong>A ConnectBox user interface or a customer-supplied MFD or optional 5″ display is used to start, operate, monitor, and shutdown the Seakeeper<\/span>.

Performance<\/strong>
Reduction of boat roll is a function of the boat\u2019s displacement, transverse metacentric height (GMT<\/sub>) and hull damping as well as the operating conditions (speed and heading with respect to waves) and sea state. The Seakeeper<\/span> controller regulates the active hydraulic brake to ensure the Seakeeper<\/span>\u2019s anti-roll torque is maximized regardless of hull characteristics or operating conditions.

Alarm and Monitoring<\/strong>
Sensors, alarms and shutdowns are provided to allow unattended operation. Sensors measure Seakeeper<\/span> and drive temperatures, gimbal angle, brake pressure, and ship motion. The Seakeeper<\/span> controller sends sensor values and alarm information to the display and also locks the brake and shuts down the motor drive in the event of an alarm condition. Seakeeper<\/span> operating history during faults or alarms is recorded in the controller\u2019s memory for subsequent recall if service is needed. Seakeeper<\/span> may access the Seakeeper<\/span>\u2019s software to gather run hours, bearing loading, and hull slamming information.

Safety<\/strong>
The brake automatically locks the Seakeeper<\/span> so it cannot generate excessive anti-rolling torque loads in the event of a system fault or alarm, loss of electrical power or loss of brake pressure. The brake can be locked from the MFD app \/ 5″ Touch Display, by shutting off AC and DC power at the supply breakers, or locally at the ConnectBox user interface.<\/p>\n","protected":false},"excerpt":{"rendered":"

Seakeeper 40 Rated RPM 5,150 RPM Angular Momentum at Rated RPM 40,000 N-m-s Anti-Rolling Torque at Rated RPM 104,720 N-m Spool-up Time to Rated Speed 70 minutes (5,150 RPM) Spool-up Time to Stabilization 40 minutes (3,863 RPM) Spool-up PowerAC MotorDC Control 5,000 Watts Max240 Watts Operating PowerAC Motor DC Control 1,900 – 4,400 Watts (Sea […]<\/p>\n","protected":false},"author":9,"featured_media":0,"parent":17301,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"manual":[320],"model":[],"document_type":[],"hidden":[],"class_list":["post-17348","page","type-page","status-publish","hentry","manual-seakeeper-40-operation-manual-90716-2"],"acf":[],"_links":{"self":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/17348","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/comments?post=17348"}],"version-history":[{"count":10,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/17348\/revisions"}],"predecessor-version":[{"id":18475,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/17348\/revisions\/18475"}],"up":[{"embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/pages\/17301"}],"wp:attachment":[{"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/media?parent=17348"}],"wp:term":[{"taxonomy":"manual","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/manual?post=17348"},{"taxonomy":"model","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/model?post=17348"},{"taxonomy":"document_type","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/document_type?post=17348"},{"taxonomy":"hidden","embeddable":true,"href":"https:\/\/manuals.seakeeper.com\/seakeeper\/wp-json\/wp\/v2\/hidden?post=17348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}